DISCOVER CARD MASTER TRUST I
8-K, 1998-07-15
ASSET-BACKED SECURITIES
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<PAGE>   1
                                                                  CONFORMED COPY

                       SECURITIES AND EXCHANGE COMMISSION
                             450 Fifth Street, N.W.
                             Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT


                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


       Date of Report (Date of earliest event reported): July 15, 1998



                          DISCOVER CARD MASTER TRUST I
                          ----------------------------
             (Exact name of registrant as specified in its charter)


Delaware                            0-23108                 Not Applicable
- --------                            -------                 --------------
(State of                           (Commission             (IRS Employer
organization)                       File Number)            Identification No.)




c/o Greenwood Trust Company
12 Read's Way
New Castle, Delaware                        19720
- ---------------------------------------------------
(Address of principal executive offices)  (Zip Code)


Registrant's telephone number, including area code: (302) 323-7184



                                  Not Applicable           
                ----------------------------------------------
                (Former address, if changed since last report)


                                  Page 1 of 134
                         Index to Exhibits is on page 7


<PAGE>   2


Item 5.  Other Events
         ------------

A) Series 1993-1:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the June 1998 Due Period with respect to Series 1993-1, which is
attached as Exhibit 20(a) hereto.

B) Series 1993-2:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the June 1998 Due Period with respect to Series 1993-2, which is
attached as Exhibit 20(b) hereto.

C) Series 1993-3:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the June 1998 Due Period with respect to Series 1993-3, which is
attached as Exhibit 20(c) hereto.

D) Series 1994-2:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the June 1998 Due Period with respect to Series 1994-2, which is
attached as Exhibit 20(d) hereto.

E) Series 1994-3:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the June 1998 Due Period with respect to Series 1994-3, which is
attached as Exhibit 20(e) hereto.

F) Series 1994-A:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the June 1998 Due Period with respect to Series 1994-A, which is
attached as Exhibit 20(f) hereto.

G) Series 1995-1:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders'
Statement for the June 1998 Due Period with respect to Series 1995-1, which is
attached as Exhibit 20(g) hereto.

H) Series 1995-2:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1995-2, which is
attached as Exhibit 20(h) hereto.

I) Series 1995-3:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1995-3, which is
attached as Exhibit 20(i) hereto.

J) Series 1996-1:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1996-1, which is
attached as Exhibit 20(j) hereto.

K) Series 1996-2:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1996-2, which is
attached as Exhibit 20(k) hereto.


                                       2
<PAGE>   3

L) Series 1996-3:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1996-3, which is
attached as Exhibit 20(l) hereto.

M) Series 1996-4:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1996-4, which is
attached as Exhibit 20(m) hereto.

N) Series 1997-1:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1997-1, which is
attached as Exhibit 20(n) hereto.

O) Series 1997-2:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1997-2, which is
attached as Exhibit 20(o) hereto.

P) Series 1997-3:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1997-3, which is
attached as Exhibit 20(p) hereto.

Q) Series 1997-4:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1997-4, which is
attached as Exhibit 20(q) hereto.

R) Series 1998-1:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1998-1, which is
attached as Exhibit 20(r) hereto.

S) Series 1998-2:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1998-2, which is
attached as Exhibit 20(s) hereto.

T) Series 1998-3:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1998-3, which is
attached as Exhibit 20(t) hereto.

U) Series 1998-4:
   -------------
On July 15, 1998 the Registrant made available the Monthly Certificateholders
Statement for the June 1998 Due Period with respect to Series 1998-4, which is
attached as Exhibit 20(u) hereto.


                                       3
<PAGE>   4

Item 7.  Financial Statements and Exhibits
         ---------------------------------
c) Exhibits
<TABLE>
<CAPTION>
Exhibit No.       Description
- -----------       -----------
<S>               <C>                                                         
20(a)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1993-1.

20(b)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1993-2.

20(c)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1993-3.

20(d)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1994-2.

20(e)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1994-3.

20(f)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1994-A.

20(g)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1995-1.

20(h)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1995-2.

20(i)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1995-3.

20(j)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1996-1.

20(k)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1996-2.

20(l)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1996-3.

20(m)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1996-4.

20(n)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1997-1.
</TABLE>


                                       4
<PAGE>   5

<TABLE>
<S>               <C>                                                         
20(o)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1997-2.

20(p)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1997-3.

20(q)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1997-4.

20(r)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1998-1.

20(s)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1998-2.

20(t)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1998-3.

20(u)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1998-4.
</TABLE>



                                       5
<PAGE>   6


                                   SIGNATURES

   Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                          DISCOVER CARD MASTER TRUST I
                                  (Registrant)

                           By: GREENWOOD TRUST COMPANY
                               as originator of the Trust


                           By:       John J. Coane
                              -----------------------------
                              John J. Coane
                              Vice President, Director of
                              Accounting and Treasurer


Date: July 15, 1998


                                       6
<PAGE>   7




                                  EXHIBIT INDEX

<TABLE>
<CAPTION>
Exhibit No.       Description
- -----------       -----------
<S>               <C>                                      
20(a)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1993-1.

20(b)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1993-2.

20(c)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1993-3.

20(d)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1994-2.

20(e)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1994-3.

20(f)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1994-A.

20(g)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1995-1.

20(h)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1995-2.

20(i)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1995-3.

20(j)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1996-1.

20(k)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1996-2.

20(l)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1996-3.

20(m)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1996-4.

20(n)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1997-1.

20(o)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1997-2.
</TABLE>


                                       7
<PAGE>   8

<TABLE>
<S>               <C>
20(p)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1997-3.

20(q)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1997-4.

20(r)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1998-1.

20(s)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1998-2.

20(t)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1998-3.

20(u)             Monthly Certificateholders' Statement, related to the Due
                  Period ending June 30, 1998, for Series 1998-4.
</TABLE>

                                       8

<PAGE>   1
                                                                     EXHIBIT (A)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1993-1 Monthly Statement
                      Class A Certificate CUSIP #25466KAA7
                      Class B Certificate CUSIP #25466KAB5


Trust Distribution Date: July 15, 1998          Due Period Ending: June 30, 1998

Pursuant to the Series Supplement dated as of October 27, 1993 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    ---------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
          Series  1993-1                                  Total           Interest         Principal
              <S>          <C>                        <C>               <C>              <C>
              Class A      30 days at 5.926250000%    $87.448784722     $4.115451389     $83.333333333

              Class B      30 days at 5.300000000%     $4.416666667     $4.416666667      $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------

<TABLE>
<S>                                                          <C>
    (a)   Aggregate Investor Interest                        $17,849,156,342.66
          Seller Interest                                     $2,915,943,453.70

          Total Master Trust                                 $20,765,099,796.36


    (b)   Group One Investor Interest                        $15,299,156,342.66

    (c)   Group Two Investor Interest                         $2,550,000,000.00

    (d)   Series 1993-1 Investor Interest                       $610,373,000.00

    (e)   Class A Investor Interest                             $562,500,000.00

          Class B Investor Interest                              $47,873,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                              Finance Charge           Principal              Yield
                                               Collections            Collections          Collections

    (a) Allocation of Collections between Investor and Seller
    <S>                                      <C>                  <C>                        <C>
        Aggregate Investor Allocation        $283,731,192.36      $2,407,643,438.08          $0.00

        Seller                                $33,570,521.31        $284,867,675.85          $0.00

    (b) Group One Allocation                 $243,497,335.07      $2,066,233,028.83          $0.00

    (c) Group Two Allocation                  $40,233,857.29        $341,410,409.25          $0.00

    (d) Series 1993-1 Allocations             $10,629,607.42         $90,199,122.31          $0.00

    (e) Class A Allocations                    $9,868,083.30         $83,737,095.64          $0.00

        Class B Allocations                      $761,524.12          $6,462,026.67          $0.00
</TABLE>


<PAGE>   2
4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                              Deposits into the
                                  SPFAs This          SPFA      Deposit Deficit     Investment
                                  Due Period         Balance        Amount            Income
          <S>                  <C>                   <C>             <C>              <C>
          Series 1993-1        $62,500,000.00        $0.00           0.00             $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                          Total Payments
                                   Amount Paid        Deficit Amount       Through This
                                  This Due Period     This Due Period       Due Period
<S>                               <C>                     <C>            <C>
          Series 1993-1           $62,500,000.00          $0.00          $187,500,000.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                               Deposits Into the
                                                   SIFAs This
                                                   Due Period          SIFA Balance
          <S>                                   <C>                      <C>
          Series 1993-1                         $3,298,027.62            $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                                This Due Period
          <S>                                                     <C>
          Class A                                                 0.75000000

          Class B                                                 1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                      Cumulative
                                                                 Investor Charged-Off
                                            This Due Period             Amount
    <S>                                     <C>                          <C>
    (a)   Group One                         $106,039,668.54              $0.00

    (b)   Group Two                          $17,521,279.61              $0.00

    (c)   Series 1993-1                       $4,629,044.69              $0.00

    (d)   Class A                             $4,297,411.64              $0.00

          Class B                               $331,633.05              $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1993-1                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>



<PAGE>   3
10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                  Per $1,000 of
                                                                Original Invested
                                                      Total         Principal
    <S>                                               <C>             <C>
    (a)   Group One                                   $0.00           $0.00

    (b)   Group Two                                   $0.00           $0.00

    (c)   Series 1993-1                               $0.00           $0.00

    (d)   Class A                                     $0.00           $0.00

          Class B                                     $0.00           $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1993-1                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
<S>                                                                  <C>
    (a)   Group One                                                  $25,713,871.67

    (b)   Group Two                                                   $4,250,000.00

    (c)   Series 1993-1                                               $1,121,455.00

    (d)   Class A                                                     $1,041,666.67

          Class B                                                        $79,788.33
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  As a Percentage
                                                                    of Class A
                                                   Total          Invested Amount
          <S>                                  <C>                   <C>
          Series 1993-1 Class B                $63,829,840.00        11.3475%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                                        Shared Amount       Class B Amount
<S>                                                     <C>                 <C>
          Maximum Amount                                $15,259,325.00      $15,957,460.00

          Available Amount                              $15,259,325.00      $15,957,460.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                                  $0.00               $0.00
</TABLE>


<PAGE>   4

15. Delinquency Summary
    -------------------

    End of Due Period Master Trust Receivables Outstanding    $21,086,742,705.80

<TABLE>
<CAPTION>
                             Delinquent Amount    Percentage of Ending
          Payment Status     Ending Balance       Receivables Outstanding
          <S>                <C>                      <C>
          30-59 days         $577,732,852.19          2.74%

          60-179 days        $943,399,940.65          4.47%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY: 
                                       ----------------------------

                                             Vice President



<PAGE>   5

                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1993-1 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 27, 1993 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1993-1 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                       <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $83,737,095.64

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $9,868,083.30

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                             $65,586,588.54
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                         <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $6,462,026.67

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $761,524.12

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                $211,439.08

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (B)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1993-2 Monthly Statement
                      Class A Certificate CUSIP #25466KAE9
                      Class B Certificate CUSIP #25466KAF6


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of December 1, 1993 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
           Series  1993-2                                   Total          Interest        Principal
              <S>            <C>                        <C>              <C>             <C>
              Class A        30 days at 5.400000000%    $87.458333337    $4.125000000    $83.333333338

              Class B        30 days at 5.750000000%     $4.791666667    $4.791666667     $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
    <S>                                                      <C>
    (a)   Aggregate Investor Interest                        $17,849,156,342.66
          Seller Interest                                     $2,915,943,453.70

          Total Master Trust                                 $20,765,099,796.36


    (b)   Group One Investor Interest                        $15,299,156,342.66

    (c)   Group Two Investor Interest                         $2,550,000,000.00

    (d)   Series 1993-2 Investor Interest                       $700,000,666.66

    (e)   Class A Investor Interest                             $666,666,666.66

          Class B Investor Interest                              $33,334,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                Finance Charge          Principal               Yield
                                                 Collections           Collections           Collections
    (a)   Allocation of Collections between Investor and Seller
    <S>                                       <C>                   <C>                         <C>
          Aggregate Investor Allocation        $283,731,192.36       $2,407,643,438.08          $0.00

          Seller                                $33,570,521.31         $284,867,675.85          $0.00

    (b)   Group One Allocation                 $243,497,335.07       $2,066,233,028.83          $0.00

    (c)   Group Two Allocation                  $40,233,857.29         $341,410,409.25          $0.00

    (d)   Series 1993-2 Allocations             $12,120,925.47         $102,853,924.55          $0.00

    (e)   Class A Allocations                   $11,581,512.55          $98,276,655.66          $0.00

          Class B Allocations                      $539,412.92           $4,577,268.89          $0.00
</TABLE>


<PAGE>   2
4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                              Deposits into the
                                  SPFAs This           SPFA         Deposit Deficit    Investment
                                  Due Period          Balance           Amount           Income
          <S>                   <C>                    <C>               <C>             <C>
          Series 1993-2         $66,666,666.67         $0.00             0.00            $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                     Total Payments
                                Amount Paid       Deficit Amount      Through This
                               This Due Period    This Due Period      Due Period
          <S>                  <C>                     <C>           <C>
          Series 1993-2        $66,666,666.67          $0.00         $133,333,333.34
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                             Deposits Into the
                                                 SIFAs This
                                                 Due Period           SIFA Balance
          <S>                                  <C>                      <C>
          Series 1993-2                        $3,459,725.42            $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                                This Due Period
          <S>                                                     <C>
          Class A                                                 0.83333333

          Class B                                                 1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                       Cumulative
                                                                  Investor Charged-Off
                                              This Due Period            Amount
    <S>                                       <C>                        <C>
    (a)   Group One                           $106,039,668.54            $0.00

    (b)   Group Two                            $17,521,279.61            $0.00

    (c)   Series 1993-2                         $5,278,492.76            $0.00

    (d)   Class A                               $5,043,586.01            $0.00

          Class B                                 $234,906.75            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                                    Per $1,000 of
                                                                  Original Invested
                                                        Total         Principal
    <S>                                                 <C>            <C>
    (a)   Group One                                     $0.00          $0.00

    (b)   Group Two                                     $0.00          $0.00

    (c)   Series 1993-2                                 $0.00          $0.00

    (d)   Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>


<PAGE>   3
10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                     Per $1,000 of
                                                                   Original Invested
                                                        Total          Principal
    <S>                                                 <C>            <C>
    (a)   Group One                                     $0.00          $0.00

    (b)   Group Two                                     $0.00          $0.00

    (c)   Series 1993-2                                 $0.00          $0.00

    (d)   Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
    <S>                                                 <C>            <C>
    (a)   Group One                                     $0.00          $0.00

    (b)   Group Two                                     $0.00          $0.00

    (c)   Series 1993-2                                 $0.00          $0.00

    (d)   Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
    <S>                                                        <C>
    (a)   Group One                                            $25,713,871.67

    (b)   Group Two                                             $4,250,000.00

    (c)   Series 1993-2                                         $1,277,778.89

    (d)   Class A                                               $1,222,222.22

          Class B                                                  $55,556.67
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  As a Percentage
                                                                    of Class A
                                                      Total       Invested Amount
          <S>                                     <C>                <C>
          Series 1993-2 Class B                   $50,000,040.00     7.5000%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                                       Shared Amount     Class B Amount
<S>                                                    <C>               <C>
          Maximum Amount                               $17,500,017.00    $8,333,340.00

          Available Amount                             $17,500,017.00    $8,333,340.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                                 $0.00            $0.00
</TABLE>



<PAGE>   4
15. Delinquency Summary
    -------------------

End of Due Period Master Trust Receivables Outstanding        $21,086,742,705.80

<TABLE>
<CAPTION>
                            Delinquent Amount     Percentage of Ending
          Payment Status      Ending Balance     Receivables Outstanding
          <S>                <C>                        <C>
          30-59 days         $577,732,852.19            2.74%

          60-179 days        $943,399,940.65            4.47%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY: 
                                       ----------------------------

                                             Vice President





<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1993-2 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of December 1, 1993 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1993-2 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                       <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $98,276,655.66

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                $11,581,512.55

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                             $69,966,666.67
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                      <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $4,577,268.89

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $539,412.92

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                $159,725.42

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (C)
                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1993-3 Monthly Statement
                      Class A Certificate CUSIP #25466KAC3
                      Class B Certificate CUSIP #25466KAD1


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of November 23, 1993 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
          Series  1993-3                                  Total         Interest      Principal
              <S>          <C>                         <C>            <C>            <C>
              Class A      30 days at 6.200000000%     $5.166666667   $5.166666667   $0.000000000

              Class B      30 days at 6.450000000%     $5.375000000   $5.375000000   $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
    <S>                                                      <C>
    (a)   Aggregate Investor Interest                        $17,849,156,342.66
          Seller Interest                                     $2,915,943,453.70

          Total Master Trust                                 $20,765,099,796.36


    (b)   Group One Investor Interest                        $15,299,156,342.66

    (c)   Group Two Investor Interest                         $2,550,000,000.00

    (d)   Series 1993-3 Investor Interest                       $366,493,000.00

    (e)   Class A Investor Interest                             $350,000,000.00

          Class B Investor Interest                              $16,493,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                             Finance Charge             Principal            Yield
                                              Collections              Collections        Collections
    (a)   Allocation of Collections between Investor and Seller
    <S>                                      <C>                    <C>                      <C>
          Aggregate Investor Allocation      $283,731,192.36        $2,407,643,438.08        $0.00

          Seller                              $33,570,521.31          $284,867,675.85        $0.00

    (b)   Group One Allocation               $243,497,335.07        $2,066,233,028.83        $0.00

    (c)   Group Two Allocation                $40,233,857.29          $341,410,409.25        $0.00

    (d)   Series 1993-3 Allocations            $5,774,891.19           $49,003,702.27        $0.00

    (e)   Class A Allocations                  $5,521,049.81           $46,849,693.38        $0.00

          Class B Allocations                    $253,841.38            $2,154,008.89        $0.00
</TABLE>


<PAGE>   2
4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                              Deposits into the
                                  SPFAs This         SPFA       Deposit Deficit    Investment
                                  Due Period        Balance          Amount          Income
          <S>                     <C>               <C>             <C>              <C>
          Series 1993-3           $0.00             $0.00            0.00            $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                      Total Payments
                                   Amount Paid      Deficit Amount    Through This
                                  This Due Period   This Due Period    Due Period
          <S>                           <C>              <C>               <C>
          Series 1993-3                 $0.00            $0.00             $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                              Deposits Into the
                                                 SIFAs This
                                                 Due Period        SIFA Balance
          <S>                                   <C>               <C>
          Series 1993-3                         $1,896,983.21     $3,793,966.42
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                                 This Due Period
          <S>                                                     <C>
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                          Cumulative
                                                                     Investor Charged-Off
                                              This Due Period               Amount
    <S>                                       <C>                           <C>
    (a)   Group One                           $106,039,668.54               $0.00

    (b)   Group Two                            $17,521,279.61               $0.00

    (c)   Series 1993-3                         $2,514,883.98               $0.00

    (d)   Class A                               $2,404,339.63               $0.00

          Class B                                 $110,544.35               $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                                 <C>            <C>
    (a)   Group One                                     $0.00          $0.00

    (b)   Group Two                                     $0.00          $0.00

    (c)   Series 1993-3                                 $0.00          $0.00

    (d)   Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>




<PAGE>   3
10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>             <C>
    (a)   Group One                                   $0.00           $0.00

    (b)   Group Two                                   $0.00           $0.00

    (c)   Series 1993-3                               $0.00           $0.00

    (d)   Class A                                     $0.00           $0.00

          Class B                                     $0.00           $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1993-3                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
    <S>                                                        <C>
    (a)   Group One                                            $25,713,871.67

    (b)   Group Two                                             $4,250,000.00

    (c)   Series 1993-3                                           $610,821.66

    (d)   Class A                                                 $583,333.33

          Class B                                                  $27,488.33
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                    As a Percentage
                                                                      of Class A
                                                      Total         Invested Amount
          <S>                                     <C>                  <C>
          Series 1993-3 Class B                   $23,822,045.00       6.8063%
</TABLE>

14.  Total Available Credit Enhancement Amounts
     ------------------------------------------
<TABLE>
<CAPTION>
                                                       Shared Amount    Class B Amount
          <S>                                          <C>              <C>
          Maximum Amount                               $9,162,325.00    $5,497,395.00

          Available Amount                             $9,162,325.00    $5,497,395.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                                $0.00            $0.00
</TABLE>


<PAGE>   4
15.  Delinquency Summary
     -------------------

     End of Due Period Master Trust Receivables Outstanding   $21,086,742,705.80

<TABLE>
<CAPTION>
                            Delinquent Amount     Percentage of Ending
          Payment Status     Ending Balance      Receivables Outstanding
          <S>                <C>                      <C>
          30-59 days         $577,732,852.19          2.74%

          60-179 days        $943,399,940.65          4.47%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY: 
                                       ----------------------------

                                             Vice President



<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1993-3 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of November 23, 1993 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1993-3 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                       <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $46,849,693.38

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $5,521,049.81

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                                      $0.00
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                         <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                         $2,154,008.89

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                    $253,841.38

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                 $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                   $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                         $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                   $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                     $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                       $0.00

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (D)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1994-2 Monthly Statement
                      Class A Certificate CUSIP #25466KAJ8
                      Class B Certificate CUSIP #25466KAK5


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of October 14, 1994 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
          Series  1994-2                                   Total           Interest        Principal
              <S>          <C>                          <C>              <C>             <C>
              Class A      30 days at 6.006250000%      $5.005208333     $5.005208333    $0.000000000

              Class B      30 days at 8.050000000%      $6.708333333     $6.708333333    $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
    <S>                                                      <C>
    (a)   Aggregate Investor Interest                        $17,849,156,342.66
          Seller Interest                                     $2,915,943,453.70

          Total Master Trust                                 $20,765,099,796.36


    (b)   Group One Investor Interest                        $15,299,156,342.66

    (c)   Group Two Investor Interest                         $2,550,000,000.00

    (d)   Series 1994-2 Investor Interest                       $894,737,000.00

    (e)   Class A Investor Interest                             $850,000,000.00

          Class B Investor Interest                              $44,737,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                             Finance Charge         Principal           Yield
                                              Collections          Collections       Collections
    <S>                                     <C>                 <C>                      <C>
    (a)   Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation     $283,731,192.36     $2,407,643,438.08        $0.00

          Seller                             $33,570,521.31       $284,867,675.85        $0.00

    (b)   Group One Allocation              $243,497,335.07     $2,066,233,028.83        $0.00

    (c)   Group Two Allocation               $40,233,857.29       $341,410,409.25        $0.00

    (d)   Series 1994-2 Allocations          $14,119,926.26       $119,816,744.57        $0.00

    (e)   Class A Allocations                $13,421,862.49       $113,893,220.12        $0.00

          Class B Allocations                   $698,063.77         $5,923,524.45        $0.00
</TABLE>


<PAGE>   2
4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                            Deposits into the
                               SPFAs This        SPFA    Deposit Deficit   Investment
                               Due Period       Balance      Amount          Income
          <S>                     <C>           <C>           <C>            <C>
          Series 1994-2           $0.00         $0.00         0.00           $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                         Total Payments
                                    Amount Paid      Deficit Amount       Through This
                                  This Due Period    This Due Period       Due Period
          <S>                           <C>                 <C>              <C>
          Series 1994-2                 $0.00               $0.00            $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                              Deposits Into the
                                                 SIFAs This
                                                 Due Period          SIFA Balance
          <S>                                   <C>                    <C>
          Series 1994-2                         $4,554,537.79          $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                                 This Due Period
          <S>                                                     <C>
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                       Cumulative
                                                                   Investor Charged-Off
                                              This Due Period           Amount
    <S>                                       <C>                        <C>
    (a)   Group One                           $106,039,668.54            $0.00

    (b)   Group Two                            $17,521,279.61            $0.00

    (c)   Series 1994-2                         $6,149,029.51            $0.00

    (d)   Class A                               $5,845,032.55            $0.00

          Class B                                 $303,996.96            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1994-2                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>


<PAGE>   3
10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>            <C>
    (a)   Group One                                   $0.00          $0.00

    (b)   Group Two                                   $0.00          $0.00

    (c)   Series 1994                                 $0.00          $0.00

    (d)   Class A                                     $0.00          $0.00

          Class B                                     $0.00          $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1994-2                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
    <S>                                                        <C>
    (a)   Group One                                            $25,713,871.67

    (b)   Group Two                                             $4,250,000.00

    (c)   Series 1994-2                                         $1,491,228.34

    (d)   Class A                                               $1,416,666.67

          Class B                                                  $74,561.67
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  As a Percentage
                                                                    of Class A
                                                      Total       Invested Amount
          <S>                                     <C>               <C>
          Series 1994-2 Class B                   $89,473,700.00    10.5263%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                                     Shared Amount      Class B Amount
          <S>                                           <C>             <C>
          Maximum Amount                                $0.00           $44,736,850.00

          Available Amount                              $0.00           $44,736,850.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                         $0.00                    $0.00
</TABLE>





<PAGE>   4
15. Delinquency Summary
    -------------------

    End of Due Period Master Trust Receivables Outstanding    $21,086,742,705.80

<TABLE>
<CAPTION>
                              Delinquent Amount   Percentage of Ending
          Payment Status      Ending Balance      Receivables Outstanding
          <S>                 <C>                      <C>
          30-59 days          $577,732,852.19          2.74%

          60-179 days         $943,399,940.65          4.47%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY: 
                                       ----------------------------

                                             Vice President




<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1994-2 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 14, 1994 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1994-2 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                         <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                     $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $113,893,220.12

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $13,421,862.49

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                 $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                   $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                         $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                   $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                     $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                               $4,254,427.08
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                       <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $5,923,524.45

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $698,063.77

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                $300,110.71

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (E)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1994-3 Monthly Statement
                      Class A Certificate CUSIP #25466KAL3
                      Class B Certificate CUSIP #25466KAM1


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of October 20, 1994 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
          Series  1994-3                                  Total         Interest       Principal
              <S>          <C>                        <C>             <C>             <C>
              Class A      30 days at 5.846250000%    $4.871875000    $4.871875000    $0.000000000

              Class B      30 days at 7.750000000%    $6.458333333    $6.458333333    $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
    <S>                                                      <C>
    (a)   Aggregate Investor Interest                        $17,849,156,342.66
          Seller Interest                                     $2,915,943,453.70

          Total Master Trust                                 $20,765,099,796.36


    (b)   Group One Investor Interest                        $15,299,156,342.66

    (c)   Group Two Investor Interest                         $2,550,000,000.00

    (d)   Series 1994-3 Investor Interest                       $789,474,000.00

    (e)   Class A Investor Interest                             $750,000,000.00

          Class B Investor Interest                              $39,474,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                Finance Charge             Principal             Yield
                                                 Collections              Collections          Collections
    <S>                                         <C>                     <C>                      <C>
    (a)   Allocation of Collections between Investor and Seller
          Aggregate Investor Allocation         $283,731,192.36         $2,407,643,438.08         $0.00

          Seller                                $33,570,521.31          $284,867,675.85           $0.00

    (b)   Group One Allocation                  $243,497,335.07         $2,066,233,028.83         $0.00

    (c)   Group Two Allocation                  $40,233,857.29          $341,410,409.25           $0.00

    (d)   Series 1994-3 Allocations             $12,469,957.34          $105,815,686.78           $0.00

    (e)   Class A Allocations                   $11,835,353.92          $100,430,664.55           $0.00

          Class B Allocations                   $634,603.42             $5,385,022.23             $0.00
</TABLE>


<PAGE>   2
4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                            Deposits into the
                               SPFAs This        SPFA      Deposit Deficit   Investment
                               Due Period       Balance         Amount         Income
          <S>                    <C>            <C>            <C>             <C>
          Series 1994-3          $0.00          $0.00          0.00            $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                       Total Payments
                                    Amount Paid      Deficit Amount     Through This
                                  This Due Period    This Due Period     Due Period
          <S>                           <C>               <C>               <C>
          Series 1994-3                 $0.00             $0.00             $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                               Deposits Into the
                                                  SIFAs This
                                                  Due Period          SIFA Balance
          <S>                                   <C>                     <C>
          Series 1994-3                         $3,908,842.50           $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                                 This Due Period
          <S>                                                     <C>
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                        Cumulative
                                                                   Investor Charged-Off
                                              This Due Period             Amount
    <S>                                       <C>                        <C>
    (a)   Group One                           $106,039,668.54            $0.00

    (b)   Group Two                            $17,521,279.61            $0.00

    (c)   Series 1994-3                         $5,430,491.24            $0.00

    (d)   Class A                               $5,154,130.36            $0.00

          Class B                                 $276,360.88            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
    <S>                                                 <C>            <C>
    (a)   Group One                                     $0.00          $0.00

    (b)   Group Two                                     $0.00          $0.00

    (c)   Series 1994-3                                 $0.00          $0.00

    (d)   Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>




<PAGE>   3
10.  Reimbursement of Investor Losses This Due Period
     ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
    <S>                                                 <C>            <C>
    (a)   Group One                                     $0.00          $0.00

    (b)   Group Two                                     $0.00          $0.00

    (c)   Series 1994-3                                 $0.00          $0.00

    (d)   Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>

11.  Aggregate Amount of Unreimbursed Investor Losses
     ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
    <S>                                                 <C>            <C>
    (a)   Group One                                     $0.00          $0.00

    (b)   Group Two                                     $0.00          $0.00

    (c)   Series 1994-3                                 $0.00          $0.00

    (d)   Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
    <S>                                                        <C>
    (a)   Group One                                            $25,713,871.67

    (b)   Group Two                                             $4,250,000.00

    (c)   Series 1994-3                                         $1,315,790.00

    (d)   Class A                                               $1,250,000.00

          Class B                                                  $65,790.00
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  As a Percentage
                                                                    of Class A
                                                      Total       Invested Amount
          <S>                                     <C>               <C>
          Series 1994-3 Class B                   $83,131,612.20    11.0842%
</TABLE>

14.  Total Available Credit Enhancement Amounts
     ------------------------------------------
<TABLE>
<CAPTION>
                                                     Shared Amount    Class B Amount
          <S>                                           <C>           <C>
          Maximum Amount                                $0.00         $39,473,700.00

          Available Amount                              $0.00         $39,473,700.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                         $0.00                  $0.00
</TABLE>


<PAGE>   4
15. Delinquency Summary
    -------------------

    End of Due Period Master Trust Receivables Outstanding    $21,086,742,705.80

<TABLE>
<CAPTION>
                             Delinquent Amount      Percentage of Ending
          Payment Status      Ending Balance       Receivables Outstanding
          <S>                <C>                          <C>
          30-59 days         $577,732,852.19              2.74%

          60-179 days        $943,399,940.65              4.47%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY: 
                                       ----------------------------

                                             Vice President


<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1994-3 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 20, 1994 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1994-3 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                         <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                     $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $100,430,664.55

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $11,835,353.92

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                 $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                   $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                         $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                   $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                     $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                               $3,653,906.25
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                         <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                         $5,385,022.23

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                    $634,603.42

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                 $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                   $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                         $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                   $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                     $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                 $254,936.25

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1

                                                                     EXHIBIT (F)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1994-A Monthly Statement


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of December 20, 1994 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
          Series  1994-A                                 Total        Interest       Principal
              <S>          <C>                        <C>            <C>            <C>
              Class A      30 days at 5.732292850%    $4.776910708   $4.776910708   $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
    <S>                                                      <C>
    (a)   Aggregate Investor Interest                        $17,849,156,342.66
          Seller Interest                                     $2,915,943,453.70

          Total Master Trust                                 $20,765,099,796.36


    (b)   Group One Investor Interest                        $15,299,156,342.66

    (c)   Group Two Investor Interest                         $2,550,000,000.00

    (d)   Series 1994-A Investor Interest                     $2,550,000,000.00

    (e)   Class A Investor Interest                           $2,550,000,000.00

          Class B Investor Interest                                       $0.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                Finance Charge              Principal               Yield
                                                 Collections               Collections            Collections
    <S>                                         <C>                     <C>                          <C>
    (a)   Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation         $283,731,192.36         $2,407,643,438.08            $0.00

          Seller                                 $33,570,521.31           $284,867,675.85            $0.00

    (b)   Group One Allocation                  $243,497,335.07         $2,066,233,028.83            $0.00

    (c)   Group Two Allocation                   $40,233,857.29           $341,410,409.25            $0.00

    (d)   Series 1994-A Allocations              $40,233,857.29           $341,410,409.25            $0.00

    (e)   Class A Allocations                    $40,233,857.29           $341,410,409.25            $0.00

          Class B Allocations                             $0.00                     $0.00            $0.00
</TABLE>



<PAGE>   2
4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
           Deposits into the SPFAs 
                               This Due      Total      Deposit Deficit    Investment
                               Period      Deposits        Amount           Income
          <S>                  <C>             <C>             <C>             <C>
          Series 1994-A        $0.00           $0.00           0.00            $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                       Total Payments
                                    Amount Paid       Deficit Amount    Through This
                                  This Due Period    This Due Period     Due Period
          <S>                           <C>               <C>              <C>
          Series 1994-A                 $0.00             $0.00            $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                              Deposits Into the
                                                  SIFAs This
                                                  Due Period           SIFA Balance
          <S>                                  <C>                       <C>
          Series 1994-A                        $12,181,122.30            $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                                 This Due Period
          <S>                                                     <C>
          Class A                                                 1.00000000

          Class B                                                 0.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                       Cumulative
                                                                        Investor
                                                                      Charged-Off
                                              This Due Period            Amount
    <S>                                       <C>                        <C>
    (a)   Group One                           $106,039,668.54            $0.00

    (b)   Group Two                            $17,521,279.61            $0.00

    (c)   Series 1994-A                        $17,521,279.61            $0.00

    (d)   Class A                              $17,521,279.61            $0.00

          Class B                                       $0.00            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1994-A                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>



<PAGE>   3
10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1994-A                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1994-A                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
    <S>                                                        <C>
    (a)   Group One                                            $25,713,871.67

    (b)   Group Two                                             $4,250,000.00

    (c)   Series 1994-A                                         $4,250,000.00

    (d)   Class A                                               $4,250,000.00

          Class B                                                       $0.00
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  As a Percentage
                                                                    of Class A
                                                      Total       Invested Amount
          <S>                                         <C>            <C>
          Series 1994-A Class B                       $0.00          0.0000%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                                         Shared Amount        Class B Amount
          <S>                                           <C>                        <C>
          Maximum Amount                                $204,000,000.00            $0.00

          Available Amount                              $204,000,000.00            $0.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                                   $0.00            $0.00
</TABLE>


<PAGE>   4
15. Delinquency Summary
    -------------------

    End of Due Period Master Trust Receivables Outstanding    $21,086,742,705.80

<TABLE>
<CAPTION>
                              Delinquent Amount    Percentage of Ending
          Payment Status      Ending Balance       Receivables Outstanding
          <S>                 <C>                       <C>
          30-59 days          $577,732,852.19           2.74%

          60-179 days         $943,399,940.65           4.47%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY: 
                                       ----------------------------

                                             Vice President



<PAGE>   5





                     MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                         Series 1994-A Monthly Statement

                                   CREDIT CARD
                            PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of December 20, 1994 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1994-A Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                        <C>
 1.   Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.   The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.   The aggregate amount of Collections processed during the related Due
      Period is equal to                                                                    $3,009,812,827.61

 4.   The aggregate amount of Class A Principal Collections processed during
      the related Due Period is equal to                                                      $341,410,409.25

 5.   The aggregate amount of Class A Finance Charge Collections processed
      during the related Due Period is equal to                                                $40,233,857.29

 6a.  The aggregate amount of Class A Principal Collections recharacterized as
      Series Yield Collections during the related Due Period is equal to                                $0.00

 6b.  The aggregate amount of Class A Additional Funds for this Distribution
      Date is equal to                                                                                  $0.00

 7.   The sum of all amounts payable to the Class A Certificateholders
      on the current Distribution Date is equal to                                             $12,181,122.30

 8.   The amount of drawings under the Credit Enhancement required to be
      made on the related Drawing Date pursuant to the Series Supplement:

      (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
           is equal to

      (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
           Amount is equal to

      (c)  with respect to the Class A Investor Interest is equal to                                    $0.00
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                         <C>
 9.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (G)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1995-1 Monthly Statement
                      Class A Certificate CUSIP #25466KAN9
                      Class B Certificate CUSIP #25466KAP4


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of April 19, 1995 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
          Series  1995-1                                Total         Interest      Principal
              <S>          <C>                       <C>            <C>            <C>
              Class A      30 days at 5.936250000%   $4.946875000   $4.946875000   $0.000000000

              Class B      30 days at 6.106250000%   $5.088541667   $5.088541667   $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
    <S>                                                      <C>
    (a)   Aggregate Investor Interest                        $17,849,156,342.66
          Seller Interest                                     $2,915,943,453.70

          Total Master Trust                                 $20,765,099,796.36


    (b)   Group One Investor Interest                        $15,299,156,342.66

    (c)   Group Two Investor Interest                         $2,550,000,000.00

    (d)   Series 1995-1 Investor Interest                       $631,579,000.00

    (e)   Class A Investor Interest                             $600,000,000.00

          Class B Investor Interest                              $31,579,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                Finance Charge             Principal             Yield
                                                 Collections              Collections         Collections
    <S>                                         <C>                    <C>                       <C>
    (a)   Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation         $283,731,192.36        $2,407,643,438.08         $0.00

          Seller                                 $33,570,521.31          $284,867,675.85         $0.00

    (b)   Group One Allocation                  $243,497,335.07        $2,066,233,028.83         $0.00

    (c)   Group Two Allocation                   $40,233,857.29          $341,410,409.25         $0.00

    (d)   Series 1995-1 Allocations               $9,963,273.81           $84,544,848.97         $0.00

    (e)   Class A Allocations                     $9,455,591.07           $80,236,831.19         $0.00

          Class B Allocations                       $507,682.74            $4,308,017.78         $0.00
</TABLE>



<PAGE>   2


4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                             Deposits into the
                                 SPFAs This        SPFA      Deposit Deficit      Investment
                                 Due Period       Balance       Amount              Income
          <S>                     <C>              <C>            <C>               <C>
          Series 1995-1           $0.00            $0.00          0.00              $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                       Total Payments
                                   Amount Paid      Deficit Amount      Through This
                                 This Due Period    This Due Period      Due Period
          <S>                         <C>                <C>               <C>
          Series 1995-1               $0.00              $0.00             $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                               Deposits Into the
                                                  SIFAs This
                                                  Due Period         SIFA Balance
          <S>                                    <C>                   <C>
          Series 1995-1                          $3,128,816.06         $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                                 This Due Period
          <S>                                                     <C>
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                        Cumulative
                                                                   Investor Charged-Off
                                              This Due Period             Amount
    <S>                                       <C>                        <C>
    (a)   Group One                           $106,039,668.54            $0.00

    (b)   Group Two                            $17,521,279.61            $0.00

    (c)   Series 1995-1                         $4,338,865.77            $0.00

    (d)   Class A                               $4,117,777.07            $0.00

          Class B                                 $221,088.70            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
    <S>                                                 <C>            <C>
    (a)   Group One                                     $0.00          $0.00

    (b)   Group Two                                     $0.00          $0.00

    (c)   Series 1995-1                                 $0.00          $0.00

    (d)   Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>




<PAGE>   3
10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
    <S>                                                 <C>            <C>
    (a)   Group One                                     $0.00          $0.00

    (b)   Group Two                                     $0.00          $0.00

    (c)   Series 1995-1                                 $0.00          $0.00

    (d)   Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                        Total        Principal
    <S>                                                 <C>            <C>
    (a)   Group One                                     $0.00          $0.00

    (b)   Group Two                                     $0.00          $0.00

    (c)   Series 1995-1                                 $0.00          $0.00

    (d)   Class A                                       $0.00          $0.00

          Class B                                       $0.00          $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
    <S>                                                        <C>
    (a)   Group One                                            $25,713,871.67

    (b)   Group Two                                             $4,250,000.00

    (c)   Series 1995-1                                         $1,052,631.67

    (d)   Class A                                               $1,000,000.00

          Class B                                                  $52,631.67
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                    As a Percentage
                                                                      of Class A
                                                      Total         Invested Amount
          <S>                                     <C>                 <C>
          Series 1995-1 Class B                   $69,473,690.00      11.5789%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                                      Shared Amount    Class B Amount
          <S>                                             <C>          <C>
          Maximum Amount                                  $0.00        $37,894,740.00

          Available Amount                                $0.00        $37,894,740.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                           $0.00                 $0.00
</TABLE>




<PAGE>   4
15. Delinquency Summary
    -------------------

    End of Due Period Master Trust Receivables Outstanding   $21,086,742,705.80

<TABLE>
<CAPTION>
                              Delinquent Amount    Percentage of Ending
          Payment Status      Ending Balance       Receivables Outstanding
          <S>                 <C>                        <C>
          30-59 days          $577,732,852.19            2.74%

          60-179 days         $943,399,940.65            4.47%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY: 
                                       ----------------------------

                                             Vice President



<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1995-1 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of April 19, 1995 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1995-1 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                       <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $80,236,831.19

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $9,455,591.07

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                              $2,968,125.00
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                         <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $4,308,017.78

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $507,682.74

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

12.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                $160,691.06

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (H)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1995-2 Monthly Statement
                      Class A Certificate CUSIP #25466KAQ2
                      Class B Certificate CUSIP #25466KAR0


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of August 1, 1995 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------

<TABLE>
<CAPTION>
          Series  1995-2                               Total         Interest      Principal
              <S>          <C>                      <C>            <C>            <C>
              Class A      30 days at 6.550000000%  $5.458333333   $5.458333333   $0.000000000

              Class B      30 days at 6.750000000%  $5.625000000   $5.625000000   $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
    <S>                                                      <C>
    (a)   Aggregate Investor Interest                        $17,849,156,342.66
          Seller Interest                                     $2,915,943,453.70

          Total Master Trust                                 $20,765,099,796.36


    (b)   Group One Investor Interest                        $15,299,156,342.66

    (c)   Group Two Investor Interest                         $2,550,000,000.00

    (d)   Series 1995-2 Investor Interest                       $526,316,000.00

    (e)   Class A Investor Interest                             $500,000,000.00

          Class B Investor Interest                              $26,316,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                Finance Charge           Principal           Yield
                                                 Collections            Collections       Collections
    <S>                                         <C>                  <C>                     <C>
    (a)   Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation         $283,731,192.36      $2,407,643,438.08       $0.00

          Seller                                 $33,570,521.31        $284,867,675.85       $0.00

    (b)   Group One Allocation                  $243,497,335.07      $2,066,233,028.83       $0.00

    (c)   Group Two Allocation                   $40,233,857.29        $341,410,409.25       $0.00

    (d)   Series 1995-2 Allocations               $8,313,304.90         $70,543,791.19       $0.00

    (e)   Class A Allocations                     $7,900,812.67         $67,043,526.74       $0.00

          Class B Allocations                       $412,492.23          $3,500,264.45       $0.00
</TABLE>


<PAGE>   2



4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                            Deposits into the
                               SPFAs This        SPFA    Deposit Deficit   Investment
                               Due Period       Balance      Amount          Income
          <S>                     <C>           <C>           <C>            <C>
          Series 1995-2           $0.00         $0.00         0.00           $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                      Total Payments
                                    Amount Paid     Deficit Amount     Through This
                                  This Due Period   This Due Period     Due Period
          <S>                           <C>              <C>               <C>
          Series 1995-2                 $0.00            $0.00             $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                               Deposits Into the
                                                  SIFAs This
                                                  Due Period         SIFA Balance
          <S>                                   <C>                <C>
          Series 1995-2                         $2,877,194.17      $14,385,970.85
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                                 This Due Period
          <S>                                                     <C>
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                       Cumulative
                                                                  Investor Charged-Off
                                              This Due Period            Amount
    <S>                                       <C>                        <C>
    (a)   Group One                           $106,039,668.54            $0.00

    (b)   Group Two                            $17,521,279.61            $0.00

    (c)   Series 1995-2                         $3,620,327.49            $0.00

    (d)   Class A                               $3,440,692.92            $0.00

          Class B                                 $179,634.57            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1995-2                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>






<PAGE>   3
10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1995-2                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1995-2                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
    <S>                                                        <C>
    (a)   Group One                                            $25,713,871.67

    (b)   Group Two                                             $4,250,000.00

    (c)   Series 1995-2                                           $877,193.33

    (d)   Class A                                                 $833,333.33

          Class B                                                  $43,860.00
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  As a Percentage
                                                                    of Class A
                                                      Total       Invested Amount
          <S>                                     <C>                <C>
          Series 1995-2 Class B                   $34,210,540.00     6.8421%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                                      Shared Amount    Class B Amount
          <S>                                             <C>          <C>
          Maximum Amount                                  $0.00        $15,789,480.00
                                                    
          Available Amount                                $0.00        $15,789,480.00
                                                    
          Amount of Drawings on Credit Enhancement  
            for this Due Period                           $0.00                 $0.00
</TABLE>



<PAGE>   4
15. Delinquency Summary
    -------------------

    End of Due Period Master Trust Receivables Outstanding   $21,086,742,705.80

<TABLE>
<CAPTION>
                             Delinquent Amount     Percentage of Ending
          Payment Status      Ending Balance     Receivables Outstanding
          <S>                <C>                        <C>
          30-59 days         $577,732,852.19            2.74%

          60-179 days        $943,399,940.65            4.47%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY: 
                                       ----------------------------

                                             Vice President



<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1995-2 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of August 1, 1995 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1995-2 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                     <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $67,043,526.74

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $7,900,812.67

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                                      $0.00
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                         <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $3,500,264.45

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $412,492.23

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                      $0.00

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (I)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1995-3 Monthly Statement
                      Class A Certificate CUSIP #25466KAS8
                      Class B Certificate CUSIP #25466KAT6


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of September 28, 1995 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
          Series  1995-3                                Total         Interest      Principal
              <S>          <C>                       <C>            <C>            <C>
              Class A      30 days at 5.866250000%   $4.888541667   $4.888541667   $0.000000000

              Class B      30 days at 5.986250000%   $4.988541667   $4.988541667   $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    ---------------------------------------------------
<TABLE>
    <S>                                                      <C>
    (a)   Aggregate Investor Interest                        $17,849,156,342.66
          Seller Interest                                     $2,915,943,453.70

          Total Master Trust                                 $20,765,099,796.36


    (b)   Group One Investor Interest                        $15,299,156,342.66

    (c)   Group Two Investor Interest                         $2,550,000,000.00

    (d)   Series 1995-3 Investor Interest                       $526,316,000.00

    (e)   Class A Investor Interest                             $500,000,000.00

          Class B Investor Interest                              $26,316,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                             Finance Charge        Principal        Yield
                                              Collections         Collections     Collections
    <S>                                     <C>                <C>                   <C>
    (a)   Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation     $283,731,192.36    $2,407,643,438.08     $0.00

          Seller                             $33,570,521.31      $284,867,675.85     $0.00

    (b)   Group One Allocation              $243,497,335.07    $2,066,233,028.83     $0.00

    (c)   Group Two Allocation               $40,233,857.29      $341,410,409.25     $0.00

    (d)   Series 1995-3 Allocations           $8,313,304.90       $70,543,791.19     $0.00

    (e)   Class A Allocations                 $7,900,812.67       $67,043,526.74     $0.00

          Class B Allocations                   $412,492.23        $3,500,264.45     $0.00
</TABLE>


<PAGE>   2
4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                            Deposits into the
                               SPFAs This        SPFA     Deposit Deficit    Investment
                               Due Period       Balance       Amount           Income
          <S>                     <C>           <C>            <C>            <C>
          Series 1995-3           $0.00         $0.00          0.00           $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                       Total Payments
                                    Amount Paid      Deficit Amount     Through This
                                  This Due Period    This Due Period     Due Period
          <S>                          <C>                <C>              <C>
          Series 1995-3                $0.00              $0.00            $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                               Deposits Into the
                                                  SIFAs This
                                                  Due Period          SIFA Balance
          <S>                                   <C>                     <C>
          Series 1995-3                         $2,575,549.29           $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                                 This Due Period
          <S>                                                     <C>
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                       Cumulative
                                                                  Investor Charged-Off
                                              This Due Period            Amount
    <S>                                       <C>                        <C>
    (a)   Group One                           $106,039,668.54            $0.00

    (b)   Group Two                            $17,521,279.61            $0.00

    (c)   Series 1995-3                         $3,620,327.49            $0.00

    (d)   Class A                               $3,440,692.92            $0.00

          Class B                                 $179,634.57            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1995-3                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>




<PAGE>   3
10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1995-3                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1995-3                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
    <S>                                                        <C>
    (a)   Group One                                            $25,713,871.67

    (b)   Group Two                                             $4,250,000.00

    (c)   Series 1995-3                                           $877,193.33

    (d)   Class A                                                 $833,333.33

          Class B                                                  $43,860.00
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  As a Percentage
                                                                     of Class A
                                                      Total       Invested Amount
          <S>                                     <C>               <C>
          Series 1995-3 Class B                   $57,894,760.00    11.5790%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                                      Shared Amount    Class B Amount
          <S>                                             <C>          <C>
          Maximum Amount                                  $0.00        $31,578,960.00

          Available Amount                                $0.00        $31,578,960.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                           $0.00                $0.00
</TABLE>




<PAGE>   4
15. Delinquency Summary
    -------------------

    End of Due Period Master Trust Receivables Outstanding    $21,086,742,705.80

<TABLE>
<CAPTION>
                             Delinquent Amount     Percentage of Ending
          Payment Status      Ending Balance      Receivables Outstanding
          <S>                <C>                        <C>
          30-59 days         $577,732,852.19            2.74%

          60-179 days        $943,399,940.65            4.47%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY: 
                                       ----------------------------

                                             Vice President



<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1995-3 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of September 28, 1995 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1995-3 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                      <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $67,043,526.74

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $7,900,812.67

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                              $2,444,270.83
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                       <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $3,500,264.45

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $412,492.23

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

12.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                $131,278.46

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (J)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1996-1 Monthly Statement
                      Class A Certificate CUSIP #25466KAU3
                      Class B Certificate CUSIP #25466KAV1


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of January 18, 1996 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding current
distributions to Certificateholders and the performances of the Trust. The
information for the Due Period and the Trust Distribution Date listed above is
set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
          Series  1996-1                                Total         Interest       Principal
              <S>          <C>                      <C>             <C>            <C>
              Class A      30 days at 5.826250000%   $4.855208333   $4.855208333   $0.000000000

              Class B      30 days at 5.956250000%   $4.963541667   $4.963541667   $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
    <S>                                                      <C>
    (a)   Aggregate Investor Interest                        $17,849,156,342.66
          Seller Interest                                     $2,915,943,453.70

          Total Master Trust                                 $20,765,099,796.36


    (b)   Group One Investor Interest                        $15,299,156,342.66

    (c)   Group Two Investor Interest                         $2,550,000,000.00

    (d)   Series 1996-1 Investor Interest                     $1,052,632,000.00

    (e)   Class A Investor Interest                           $1,000,000,000.00

          Class B Investor Interest                              $52,632,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                            Finance Charge          Principal           Yield
                                             Collections           Collections       Collections
    <S>                                    <C>                  <C>                     <C>
    (a)   Allocation of Collections between Investor and Seller

          Aggregate Investor Allocation    $283,731,192.36      $2,407,643,438.08       $0.00

          Seller                            $33,570,521.31        $284,867,675.85       $0.00

    (b)   Group One Allocation             $243,497,335.07      $2,066,233,028.83       $0.00

    (c)   Group Two Allocation              $40,233,857.29        $341,410,409.25       $0.00

    (d)   Series 1996-1 Allocations         $16,594,879.62        $140,818,331.26       $0.00

    (e)   Class A Allocations               $15,769,895.17        $133,817,802.36       $0.00

          Class B Allocations                  $824,984.45          $7,000,528.90       $0.00
</TABLE>



<PAGE>   2


4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                            Deposits into the
                               SPFAs This        SPFA      Deposit Deficit    Investment
                               Due Period       Balance        Amount           Income
          <S>                     <C>           <C>             <C>            <C>
          Series 1996-1           $0.00         $0.00           0.00           $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                        Total Payments
                                    Amount Paid      Deficit Amount      Through This
                                  This Due Period    This Due Period      Due Period
          <S>                           <C>               <C>               <C>
          Series 1996-1                 $0.00             $0.00             $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                               Deposits Into the
                                                  SIFAs This
                                                  Due Period         SIFA Balance
          <S>                                    <C>                    <C>
          Series 1996-1                          $5,116,449.46          $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                                 This Due Period
          <S>                                                     <C>
          Class A                                                 1.00000000

          Class B                                                 1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                       Cumulative
                                                                   Investor Charged-Off
                                              This Due Period            Amount
    <S>                                       <C>                        <C>
    (a)   Group One                           $106,039,668.54            $0.00

    (b)   Group Two                            $17,521,279.61            $0.00

    (c)   Series 1996-1                         $7,226,836.93            $0.00

    (d)   Class A                               $6,867,567.79            $0.00

          Class B                                 $359,269.14            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1996-1                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>



<PAGE>   3

10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1996-1                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                                   Per $1,000 of
                                                                 Original Invested
                                                      Total          Principal
    <S>                                               <C>              <C>
    (a)   Group One                                   $0.00            $0.00

    (b)   Group Two                                   $0.00            $0.00

    (c)   Series 1996-1                               $0.00            $0.00

    (d)   Class A                                     $0.00            $0.00

          Class B                                     $0.00            $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
    <S>                                                        <C>
    (a)   Group One                                            $25,713,871.67

    (b)   Group Two                                             $4,250,000.00

    (c)   Series 1996-1                                         $1,754,386.67

    (d)   Class A                                               $1,666,666.67

          Class B                                                  $87,720.00
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  As a Percentage
                                                                    of Class A
                                                      Total       Invested Amount
          <S>                                    <C>                <C>
          Series 1996-1 Class B                  $105,263,200.00    10.5263%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                                      Shared Amount       Class B Amount
          <S>                                             <C>             <C>
          Maximum Amount                                  $0.00           $57,894,760.00

          Available Amount                                $0.00           $57,894,760.00

          Amount of Drawings on Credit Enhancement
            for this Due Period                           $0.00                    $0.00
</TABLE>




<PAGE>   4
15. Delinquency Summary
    -------------------

    End of Due Period Master Trust Receivables Outstanding    $21,086,742,705.80

<TABLE>
<CAPTION>
                            Delinquent Amount      Percentage of Ending
          Payment Status      Ending Balance     Receivables Outstanding
          <S>                <C>                         <C>
          30-59 days         $577,732,852.19             2.74%

          60-179 days        $943,399,940.65             4.47%
</TABLE>


                                      U.S. BANK NATIONAL ASSOCIATION
                                      as Trustee


                                   BY: 
                                       ----------------------------

                                             Vice President

<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1996-1 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of January 18, 1996 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1996-1 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                      <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                      $133,817,802.36

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                $15,769,895.17

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                              $4,855,208.33
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                         <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                         $7,000,528.90

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                    $824,984.45

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                 $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                   $0.00

12.  The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                         $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                   $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                     $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                 $261,241.13

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (K)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1996-2 Monthly Statement
                      Class A Certificate CUSIP #25466KAW9
                      Class B Certificate CUSIP #25466KAX7


Trust Distribution Date: July 15, 1998     Due Period Ending: June 30, 1998

Pursuant to the Series Supplement dated as of January 29, 1996 relating to
the Pooling and Servicing Agreement dated as of October 1, 1993 by and
between Greenwood Trust Company and U.S. Bank National Association, as
Trustee, the Trustee is required to prepare certain information each month
regarding current distributions to Certificateholders and the performances
of the Trust. The information for the Due Period and the Trust Distribution
Date listed above is set forth below:

1.   Payments for the benefit of Series Investors this Due Period (per
     -----------------------------------------------------------------
     $1000 of Class Initial Investor Interest)
     -----------------------------------------
<TABLE>
<CAPTION>
    Series  1996-2                                Total       Interest     Principal
       <S>           <C>                      <C>           <C>           <C>
        Class A      30 days at 5.876250000%  $4.896875000  $4.896875000  $0.000000000

        Class B      30 days at 6.016250000%  $5.013541667  $5.013541667  $0.000000000
</TABLE>

2.   Principal Receivables at the end of the Due Period
     --------------------------------------------------
<TABLE>
<CAPTION>
    <S>   <C>                                            <C>
    (a)   Aggregate Investor Interest                    $17,849,156,342.66
          Seller Interest                                 $2,915,943,453.70

          Total Master Trust                             $20,765,099,796.36

    (b)   Group One Investor Interest                    $15,299,156,342.66

    (c)   Group Two Investor Interest                     $2,550,000,000.00

    (d)   Series 1996-2 Investor Interest                   $947,369,000.00

    (e)   Class A Investor Interest                         $900,000,000.00

          Class B Investor Interest                          $47,369,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                  Finance Charge               Principal            Yield
                                                   Collections                Collections        Collections

    (a)   Allocation of Collections between Investor and Seller

    <S>   <C>                                     <C>                       <C>                      <C>
          Aggregate Investor Allocation           $283,731,192.36           $2,407,643,438.08        $0.00

          Seller                                   $33,570,521.31             $284,867,675.85        $0.00

    (b)   Group One Allocation                    $243,497,335.07           $2,066,233,028.83        $0.00

    (c)   Group Two Allocation                     $40,233,857.29             $341,410,409.25        $0.00

    (d)   Series 1996-2 Allocations                $14,944,910.72             $126,817,273.46        $0.00

    (e)   Class A Allocations                      $14,183,386.60             $120,355,246.79        $0.00

          Class B Allocations                         $761,524.12               $6,462,026.67        $0.00
</TABLE>


<PAGE>   2


4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                       Deposits into the
                          SPFAs This             SPFA         Deposit Deficit     Investment
                          Due Period            Balance            Amount           Income

    <S>                     <C>                  <C>               <C>              <C>
    Series 1996-2           $0.00                $0.00             0.00             $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>

                                                                        Total Payments
                             Amount Paid          Deficit Amount         Through This
                            This Due Period       This Due Period         Due Period

    <S>                        <C>                    <C>                    <C>
    Series 1996-2              $0.00                  $0.00                  $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                Deposits Into the
                                    SIFAs This
                                    DuePeriod               SIFA Balance

<S>                              <C>                          <C>  
    Series 1996-2                 $4,644,673.96                $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                           This Due Period

<S>                                                             <C>       
    Class A                                                     1.00000000

    Class B                                                     1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                Cumulative
                                                           Investor Charged-Off
                                       This Due Period            Amount
<S>                                    <C>                        <C>  
    (a)   Group One                    $106,039,668.54            $0.00

    (b)   Group Two                     $17,521,279.61            $0.00

    (c)   Series 1996-2                  $6,508,298.65            $0.00

    (d)   Class A                        $6,176,665.60            $0.00

          Class B                          $331,633.05            $0.00
</TABLE>
9.  Investor Losses This Due Period
    -------------------------------

<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                            <C>                <C>  
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1996-2                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

<PAGE>   3

10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                            <C>                <C>  
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1996-2                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                               Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                            <C>                <C>  
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1996-2                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
<S>                                                     <C>           
    (a)   Group One                                     $25,713,871.67

    (b)   Group Two                                      $4,250,000.00

    (c)   Series 1996-2                                  $1,578,948.33

    (d)   Class A                                        $1,500,000.00

          Class B                                           $78,948.33
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                        As a Percentage
                                                           of Class A
                                       Total            Invested Amount

<S>                                <C>                     <C>     
    Series 1996-2 Class B          $104,210,590.00         11.5790%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                             Shared Amount      Class B Amount
<S>                                               <C>          <C>           
    Maximum Amount                                $0.00         $56,842,140.00

    Available Amount                              $0.00         $56,842,140.00

    Amount of Drawings on Credit Enhancement
      for this Due Period                         $0.00                  $0.00
</TABLE>


<PAGE>   4

15. Delinquency Summary
    -------------------
<TABLE>
<S>                                                               <C>               
    End of Due Period Master Trust Receivables Outstanding        $21,086,742,705.80
</TABLE>

<TABLE>
<CAPTION>
                            Delinquent Amount       Percentage of Ending
    Payment Status           Ending Balance        Receivables Outstanding
<S>                        <C>                            <C>  
    30-59 days              $577,732,852.19                2.74%

    60-179 days             $943,399,940.65                4.47%
</TABLE>


                                                  U.S. BANK NATIONAL ASSOCIATION
                                                  as Trustee


                                               BY: 
                                                   ----------------------------
                                                         Vice President



<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1996-2 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of January 29, 1996 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1996-2 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                     <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                      $120,355,246.79

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                $14,183,386.60

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                              $4,407,187.50
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                         <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $6,462,026.67

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $761,524.12

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                $237,486.46

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (L)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1996-3 Monthly Statement
                      Class A Certificate CUSIP #25466KAY5
                      Class B Certificate CUSIP #25466KAZ2


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of February 21, 1996 relating to
the Pooling and Servicing Agreement dated as of October 1, 1993 by and
between Greenwood Trust Company and U.S. Bank National Association, as
Trustee, the Trustee is required to prepare certain information each month
regarding current distributions to Certificateholders and the performances
of the Trust. The information for the Due Period and the Trust Distribution
Date listed above is set forth below:

1.   Payments for the benefit of Series Investors this Due Period (per $1000 of
     --------------------------------------------------------------------------
     Class Initial Investor Interest)
     --------------------------------
<TABLE>
<CAPTION>
    Series  1996-3                                 Total       Interest      Principal
<S>                 <C>                        <C>            <C>           <C>         
        Class A     30 days at 6.050000000%    $5.041666667   $5.041666667  $0.000000000

        Class B     30 days at 6.250000000%    $5.208333333   $5.208333333  $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
<S>       <C>                                          <C>
    (a)   Aggregate Investor Interest                   $17,849,156,342.66
          Seller Interest                                $2,915,943,453.70

          Total Master Trust                            $20,765,099,796.36

    (b)   Group One Investor Interest                   $15,299,156,342.66

    (c)   Group Two Investor Interest                    $2,550,000,000.00

    (d)   Series 1996-3 Investor Interest                  $631,579,000.00

    (e)   Class A Investor Interest                        $600,000,000.00

          Class B Investor Interest                         $31,579,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                            Finance Charge           Principal           Yield
                                              Collections           Collections       Collections

    (a)   Allocation of Collections between Investor and Seller

<S>                                         <C>                  <C>                     <C>  
          Aggregate Investor Allocation     $283,731,192.36      $2,407,643,438.08       $0.00

          Seller                             $33,570,521.31        $284,867,675.85       $0.00

    (b)   Group One Allocation              $243,497,335.07      $2,066,233,028.83       $0.00

    (c)   Group Two Allocation               $40,233,857.29        $341,410,409.25       $0.00

    (d)   Series 1996-3 Allocations           $9,963,273.81         $84,544,848.97       $0.00

    (e)   Class A Allocations                 $9,455,591.07         $80,236,831.19       $0.00

          Class B Allocations                   $507,682.74          $4,308,017.78       $0.00
</TABLE>


<PAGE>   2

4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                      Deposits into the
                         SPFAs This          SPFA      Deposit Deficit    Investment
                         Due Period         Balance        Amount           Income
<S>                        <C>              <C>             <C>            <C>  
    Series 1996-3          $0.00            $0.00           0.00            $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  Total Payments
                              Amount Paid       Deficit Amount     Through This
                            This Due Period    This Due Period      Due Period
<S>                             <C>              <C>                   <C>  
    Series 1996-3                $0.00            $0.00                $0.00
</TABLE>
6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                       Deposits Into the
                                           SIFAs This
                                            DuePeriod           SIFA Balance
<S>                                      <C>                  <C>           
    Series 1996-3                         $3,189,473.96        $15,947,369.80
</TABLE>

7.  Pool Factors
    ------------

<TABLE>
<CAPTION>
                                                           This Due Period
<S>                                                          <C>       
    Class A                                                  1.00000000

    Class B                                                  1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                 Cumulative
                                                            Investor Charged-Off
                                         This Due Period           Amount
<S>                                      <C>                        <C>  
    (a)   Group One                      $106,039,668.54            $0.00

    (b)   Group Two                       $17,521,279.61            $0.00

    (c)   Series 1996-3                    $4,338,865.77            $0.00

    (d)   Class A                          $4,117,777.07            $0.00

          Class B                            $221,088.70            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                            <C>                <C>  
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1996-3                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>


<PAGE>   3


10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                            <C>                <C>  
    (a)  Group One                             $0.00              $0.00

    (b)  Group Two                             $0.00              $0.00

    (c)  Series 1996-3                         $0.00              $0.00

    (d)  Class A                               $0.00              $0.00

         Class B                               $0.00              $0.00
</TABLE>

11.  Aggregate Amount of Unreimbursed Investor Losses
     ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                           Original Invested
                                               Total           Principal
<S>                                            <C>               <C>  
    (a)   Group One                            $0.00             $0.00

    (b)   Group Two                            $0.00             $0.00

    (c)   Series 1996-3                        $0.00             $0.00

    (d)   Class A                              $0.00             $0.00

          Class B                              $0.00             $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------

<TABLE>
<S>                                                      <C>           
    (a)   Group One                                      $25,713,871.67

    (b)   Group Two                                       $4,250,000.00

    (c)   Series 1996-3                                   $1,052,631.67

    (d)   Class A                                         $1,000,000.00

          Class B                                            $52,631.67
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                           As a Percentage
                                                             of Class A
                                     Total                 Invested Amount
<S>                              <C>                           <C>    
    Series 1996-3 Class B        $37,894,740.00                6.3158%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                             Shared Amount    Class B Amount
<S>                                               <C>         <C>           
    Maximum Amount                                $0.00       $18,947,370.00

    Available Amount                              $0.00       $18,947,370.00

    Amount of Drawings on Credit Enhancement
      for this Due Period                         $0.00                $0.00
</TABLE>



<PAGE>   4
15. Delinquency Summary
   --------------------
<TABLE>
<S>                                                            <C>               
    End of Due Period Master Trust Receivables Outstanding     $21,086,742,705.80
</TABLE>

<TABLE>
<CAPTION>
                            Delinquent Amount        Percentage of Ending
    Payment Status            Ending Balance         Receivables Outstanding
<S>                         <C>                            <C>  
    30-59 days               $577,732,852.19                2.74%

    60-179 days              $943,399,940.65                4.47%
</TABLE>


                                                 U.S. BANK NATIONAL ASSOCIATION
                                                 as Trustee


                                              BY:
                                                  ----------------------------
                                                        Vice President




<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1996-3 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of February 21, 1996 (the "Series Supplement")
by and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1996-3 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                       <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $80,236,831.19

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $9,455,591.07

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                                      $0.00
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                         <C>
 9.  The aggregate amount of Class B Principal Collections processed during
      the related Due Period is equal to                                                        $4,308,017.78

10.  The aggregate amount of Class B Finance Charge Collections processed
      during the related Due Period is equal to                                                   $507,682.74

11a. The aggregate amount of Class B Principal Collections recharacterized as
      Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
      date is equal to                                                                                  $0.00

 12.  The amount of drawings under the Credit Enhancement required to be
      made on the related Drawing Date pursuant to the Series Supplement:

      (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
            is equal to

      (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
            Amount is equal to

      (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                       $0.00

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (M)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1996-4 Monthly Statement
                      Class A Certificate CUSIP #25466KBA6
                      Class B Certificate CUSIP #25466KBB4


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of April 30, 1996 relating to
the Pooling and Servicing Agreement dated as of October 1, 1993 by and
between Greenwood Trust Company and U.S. Bank National Association, as
Trustee, the Trustee is required to prepare certain information each month
regarding current distributions to Certificateholders and the performances
of the Trust. The information for the Due Period and the Trust Distribution
Date listed above is set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------

<TABLE>
<CAPTION>
    Series  1996-4                               Total          Interest      Principal
<S>                  <C>                      <C>            <C>            <C>
        Class A      30 days at 6.031250000%  $5.026041667    $5.026041667  $0.000000000

        Class B      30 days at 6.206250000%  $5.171875000    $5.171875000  $0.000000000
</TABLE>

2. Principal Receivables at the end of the Due Period
   --------------------------------------------------
<TABLE>
<CAPTION>
<S>     <C>                                           <C>               
   (a)   Aggregate Investor Interest                   $17,849,156,342.66
         Seller Interest                                $2,915,943,453.70

         Total Master Trust                            $20,765,099,796.36


   (b)   Group One Investor Interest                   $15,299,156,342.66

   (c)   Group Two Investor Interest                    $2,550,000,000.00

   (d)   Series 1996-4 Investor Interest                $1,052,632,000.00

   (e)   Class A Investor Interest                      $1,000,000,000.00

         Class B Investor Interest                         $52,632,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                            Finance Charge          Principal           Yield
                                             Collections           Collections       Collections

    (a)   Allocation of Collections between Investor and Seller
<S>       <C>                               <C>                  <C>                      <C>  

          Aggregate Investor Allocation     $283,731,192.36      $2,407,643,438.08        $0.00

          Seller                             $33,570,521.31        $284,867,675.85        $0.00

    (b)   Group One Allocation              $243,497,335.07      $2,066,233,028.83        $0.00

    (c)   Group Two Allocation               $40,233,857.29        $341,410,409.25        $0.00

    (d)   Series 1996-4 Allocations          $16,594,879.62        $140,818,331.26        $0.00

    (e)   Class A Allocations                $15,769,895.17        $133,817,802.36        $0.00

          Class B Allocations                   $824,984.45          $7,000,528.90        $0.00
</TABLE>



<PAGE>   2


4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                     Deposits into the
                        SPFAs This          SPFA      Deposit Deficit    Investment
                        Due Period         Balance        Amount           Income
<S>                       <C>             <C>            <C>              <C>  
    Series 1996-4           $0.00           $0.00          0.00             $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                     Total Payments
                             Amount Paid         Deficit Amount       Through This
                           This Due Period      This Due Period        Due Period

<S>                            <C>                  <C>                  <C>  
    Series 1996-4               $0.00                $0.00                $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                              Deposits Into the
                                  SIFAs This
                                  DuePeriod                 SIFA Balance
<S>                             <C>                             <C>  
    Series 1996-4               $5,298,247.79                   $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                           This Due Period
<S>                                                         <C>       
    Class A                                                     1.00000000

    Class B                                                     1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                      Cumulative
                                                                 Investor Charged-Off
                                         This Due Period                Amount
<S>       <C>                            <C>                             <C>
    (a)   Group One                      $106,039,668.54                 $0.00

    (b)   Group Two                       $17,521,279.61                 $0.00

    (c)   Series 1996-4                    $7,226,836.93                 $0.00

    (d)   Class A                          $6,867,567.79                 $0.00

          Class B                            $359,269.14                 $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                             Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>       <C>                                  <C>                <C>  
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1996-4                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>


<PAGE>   3

10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>      <C>                                   <C>                <C>  
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1996-4                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>       <C>                                  <C>                <C>  
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1996-4                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
<CAPTION>
<S>      <C>                                              <C>           
    (a)   Group One                                       $25,713,871.67

    (b)   Group Two                                        $4,250,000.00

    (c)   Series 1996-4                                    $1,754,386.67

    (d)   Class A                                          $1,666,666.67

          Class B                                             $87,720.00
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                            As a Percentage
                                                               of Class A
                                             Total          Invested Amount
<S>                                     <C>                     <C>     
     Series 1996-4 Class B              $115,789,520.00         11.5790%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                               Shared Amount    Class B Amount
<S>                                                <C>          <C>           
     Maximum Amount                                $0.00        $63,157,920.00

     Available Amount                              $0.00        $63,157,920.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00                 $0.00
</TABLE>


<PAGE>   4
<TABLE>
<S>                                                          <C>
15. Delinquency Summary
    -------------------

    End of Due Period Master Trust Receivables Outstanding    $21,086,742,705.80
</TABLE>
<TABLE>
<CAPTION>
                            Delinquent Amount           Percentage of Ending
    Payment Status           Ending Balance            Receivables Outstanding

<S>                        <C>                                 <C>  
    30-59 days              $577,732,852.19                     2.74%

    60-179 days             $943,399,940.65                     4.47%
</TABLE>

                                                  U.S. BANK NATIONAL ASSOCIATION
                                                  as Trustee


                                               BY: 
                                                   ----------------------------
                                                         Vice President


<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1996-4 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of April 30, 1996 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1996-4 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                      <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                      $133,817,802.36

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                $15,769,895.17

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
      date is equal to                                                                                 $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                              $5,026,041.67
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                         <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                         $7,000,528.90

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                    $824,984.45

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                 $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                   $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                         $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                   $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                     $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                 $272,206.12

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (N)


                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1997-1 Monthly Statement
                      Class A Certificate CUSIP #25466KBD0
                      Class B Certificate CUSIP #25466KBE8


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of August 26, 1997 relating to
the Pooling and Servicing Agreement dated as of October 1, 1993 by and
between Greenwood Trust Company and U.S. Bank National Association, as
Trustee, the Trustee is required to prepare certain information each month
regarding current distributions to Certificateholders and the performances
of the Trust. The information for the Due Period and the Trust Distribution
Date listed above is set forth below:

1.   Payments for the benefit of Series Investors this Due Period (per $1000 of
     --------------------------------------------------------------------------
     Class Initial Investor Interest)
     --------------------------------
<TABLE>
<CAPTION>
    Series  1997-1                                Total          Interest        Principal
<S>                  <C>                      <C>              <C>             <C>         
        Class A      30 days at 5.746250000%  $4.788541667     $4.788541667    $0.000000000

        Class B      30 days at 5.926250000%  $4.938541667     $4.938541667    $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
<CAPTION>
<S>       <C>                                           <C>               
    (a)   Aggregate Investor Interest                   $17,849,156,342.66
          Seller Interest                                $2,915,943,453.70

          Total Master Trust                            $20,765,099,796.36

    (b)   Group One Investor Interest                   $15,299,156,342.66

    (c)   Group Two Investor Interest                    $2,550,000,000.00

    (d)   Series 1997-1 Investor Interest                  $789,474,000.00

    (e)   Class A Investor Interest                        $750,000,000.00

          Class B Investor Interest                         $39,474,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                   Finance Charge          Principal          Yield
                                                     Collections          Collections      Collections

   (a)   Allocation of Collections between Investor and Seller
 <S>     <C>                                       <C>                 <C>                     <C>  

          Aggregate Investor Allocation           $283,731,192.36     $2,407,643,438.08       $0.00

          Seller                                    $33,570,521.31       $284,867,675.85       $0.00

    (b)   Group One Allocation                     $243,497,335.07     $2,066,233,028.83       $0.00

    (c)   Group Two Allocation                      $40,233,857.29       $341,410,409.25       $0.00

    (d)   Series 1997-1 Allocations                 $12,469,957.34       $105,815,686.78       $0.00

    (e)   Class A Allocations                       $11,835,353.92       $100,430,664.55       $0.00

          Class B Allocations                          $634,603.42         $5,385,022.23       $0.00
</TABLE>



<PAGE>   2

4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                      Deposits into the
                         SPFAs This           SPFA       Deposit Deficit    Investment
                         Due Period          Balance         Amount           Income
<S>                        <C>              <C>              <C>             <C>  
    Series 1997-1           $0.00            $0.00            0.00            $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                    Total Payments
                             Amount Paid       Deficit Amount        Through This
                           This Due Period     This Due Period        Due Period

<S>                              <C>                <C>                  <C>  
    Series 1997-1                $0.00              $0.00                $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
   --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                  Deposits Into the
                                     SIFAs This
                                      DuePeriod             SIFA Balance
<S>                               <C>                         <C>  
    Series 1997-1                   $3,786,350.24               $0.00
</TABLE>

7.  Pool Factors
    ------------

<TABLE>
<CAPTION>
                                                           This Due Period

<S>                                                         <C>       
    Class A                                                 1.00000000

    Class B                                                 1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                  Cumulative
                                                             Investor Charged-Off
                                         This Due Period            Amount
<S>       <C>                            <C>                        <C>  
    (a)   Group One                      $106,039,668.54            $0.00

    (b)   Group Two                       $17,521,279.61            $0.00

    (c)   Series 1997-1                    $5,430,491.24            $0.00

    (d)   Class A                          $5,154,130.36            $0.00

          Class B                            $276,360.88            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                               Per $1,000 of
                                                             Original Invested
                                               Total             Principal
<S>       <C>                                  <C>                <C>  
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1997-1                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>



<PAGE>   3

10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                               Per $1,000 of
                                                             Original Invested
                                               Total             Principal
<S>                                            <C>                <C>  
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1997-1                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
   -------------------------------------------------
<TABLE>
<CAPTION>
                                                               Per $1,000 of
                                                             Original Invested
                                               Total             Principal
<S>                                            <C>                <C>  
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1997-1                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------

<TABLE>
<S>                                                      <C>           
    (a)   Group One                                      $25,713,871.67

    (b)   Group Two                                       $4,250,000.00

    (c)   Series 1997-1                                   $1,315,790.00

    (d)   Class A                                         $1,250,000.00

          Class B                                            $65,790.00
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
   -----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                         As a Percentage
                                                            of Class A
                                           Total         Invested Amount
<S>                                   <C>                    <C>     
    Series 1997-1 Class B             $98,684,250.00         13.1579%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                             Shared Amount    Class B Amount
<S>                                               <C>         <C>           
    Maximum Amount                                $0.00       $59,210,550.00

    Available Amount                              $0.00       $59,210,550.00

    Amount of Drawings on Credit Enhancement
      for this Due Period                         $0.00                $0.00
</TABLE>


<PAGE>   4
<TABLE>
15. Delinquency Summary
   --------------------
<S>                                                          <C>
    End of Due Period Master Trust Receivables Outstanding    $21,086,742,705.80
</TABLE>
<TABLE>
<CAPTION>
                              Delinquent Amount        Percentage of Ending
    Payment Status             Ending Balance        Receivables Outstanding

<S>                            <C>                            <C>  
    30-59 days                 $577,732,852.19                2.74%

    60-179 days                $943,399,940.65                4.47%
</TABLE>


                                               U.S. BANK NATIONAL ASSOCIATION
                                               as Trustee


                                            BY: 
                                                ----------------------------
                                                      Vice President

<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1997-1 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of August 26, 1997 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1997-1 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                       <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                      $100,430,664.55

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                $11,835,353.92

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                              $3,591,406.25
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                       <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $5,385,022.23

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $634,603.42

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                $194,943.99

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (O)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1997-2 Monthly Statement
                      Class A Certificate CUSIP #25466KBF5
                      Class B Certificate CUSIP #25466KBG3


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of October 15, 1997 relating to
the Pooling and Servicing Agreement dated as of October 1, 1993 by and
between Greenwood Trust Company and U.S. Bank National Association, as
Trustee, the Trustee is required to prepare certain information each month
regarding current distributions to Certificateholders and the performances
of the Trust. The information for the Due Period and the Trust Distribution
Date listed above is set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
    Series  1997-2                               Total           Interest      Principal
<S>                   <C>                     <C>              <C>           <C>         
         Class A      30 days at 6.792000000%  $5.660000000     $5.660000000  $0.000000000

         Class B      30 days at 6.056250000%  $5.046875000     $5.046875000  $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
<S>       <C>                                              <C>               
    (a)   Aggregate Investor Interest                       $17,849,156,342.66
          Seller Interest                                    $2,915,943,453.70

          Total Master Trust                                $20,765,099,796.36

    (b)   Group One Investor Interest                       $15,299,156,342.66

    (c)   Group Two Investor Interest                        $2,550,000,000.00

    (d)   Series 1997-2 Investor Interest                      $526,316,000.00

    (e)   Class A Investor Interest                            $500,000,000.00

          Class B Investor Interest                             $26,316,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                             Finance Charge            Principal           Yield
                                               Collections            Collections       Collections

    (a)   Allocation of Collections between Investor and Seller
<S>                                            <C>                   <C>                      <C>  

          Aggregate Investor Allocation        $283,731,192.36       $2,407,643,438.08        $0.00

          Seller                                $33,570,521.31         $284,867,675.85        $0.00

    (b)   Group One Allocation                 $243,497,335.07       $2,066,233,028.83        $0.00

    (c)   Group Two Allocation                  $40,233,857.29         $341,410,409.25        $0.00

    (d)   Series 1997-2 Allocations              $8,313,304.90          $70,543,791.19        $0.00

    (e)   Class A Allocations                    $7,900,812.67          $67,043,526.74        $0.00

          Class B Allocations                      $412,492.23           $3,500,264.45        $0.00
</TABLE>


<PAGE>   2

4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                        Deposits into the
                           SPFAs This       SPFA        Deposit Deficit   Investment
                           Due Period      Balance          Amount          Income
<S>                         <C>           <C>              <C>            <C>  
    Series 1997-2            $0.00         $0.00            0.00           $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                      Total Payments
                Amount Paid    PSA Index         Monthly           Deficit Amount      Through This
             This Due Period     Rate*      Amortization Rate*    This Due Period       Due Period
<S>                 <C>          <C>             <C>                  <C>                 <C>  
    Class A         $0.00         N/A             N/A                 $0.00               $0.00

    Class B         $0.00         N/A             N/A                 $0.00               $0.00
</TABLE>

    *Rates are only applicable during the Class A Controlled Liquidation Period.

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                 Deposits Into the
                                    SIFAs This
                                    DuePeriod            SIFA Balance

<S>                              <C>                        <C>  
    Series 1997-2                 $2,962,813.56              $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                           This Due Period
<S>                                                             <C>       
    Class A                                                     1.00000000

    Class B                                                     1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                   Cumulative
                                                              Investor Charged-Off
                                         This Due Period            Amount

<S>       <C>                            <C>                        <C>  
    (a)   Group One                      $106,039,668.54            $0.00

    (b)   Group Two                       $17,521,279.61            $0.00

    (c)   Series 1997-2                    $3,620,327.49            $0.00

    (d)   Class A                          $3,440,692.92            $0.00

          Class B                            $179,634.57            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                             Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                          <C>                 <C>
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1997-2                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

<PAGE>   3
10.  Reimbursement of Investor Losses This Due Period
     ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                            <C>                <C>  
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1997-2                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                             Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                           <C>                <C>  
    (a)  Group One                            $0.00              $0.00

    (b)  Group Two                            $0.00              $0.00

    (c)  Series 1997-2                        $0.00              $0.00

    (d)  Class A                              $0.00              $0.00

         Class B                              $0.00              $0.00
</TABLE>
12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
<S>                                                       <C>           
    (a)  Group One                                        $25,713,871.67

    (b)  Group Two                                         $4,250,000.00

    (c)  Series 1997-2                                       $877,193.33

    (d)  Class A                                             $833,333.33

         Class B                                              $43,860.00
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                         As a Percentage
                                                            of Class A
                                           Total         Invested Amount
<S>                                   <C>                   <C>    
    Series 1997-2 Class B              $47,368,440.00        9.4737%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                              Shared Amount    Class B Amount

<S>                                               <C>          <C>           
    Maximum Amount                                $0.00        $21,052,640.00

    Available Amount                              $0.00        $21,052,640.00

    Amount of Drawings on Credit Enhancement
      for this Due Period                         $0.00                 $0.00
</TABLE>

<PAGE>   4
<TABLE>
15. Delinquency Summary
    -------------------
<S>                                                          <C>
    End of Due Period Master Trust Receivables Outstanding    $21,086,742,705.80
</TABLE>
<TABLE>
<CAPTION>
                              Delinquent Amount         Percentage of Ending
    Payment Status             Ending Balance          Receivables Outstanding

<S>                            <C>                              <C>  
    30-59 days                 $577,732,852.19                  2.74%

    60-179 days                $943,399,940.65                  4.47%
</TABLE>


                                                 U.S. BANK NATIONAL ASSOCIATION
                                                 as Trustee


                                              BY:
                                                  ----------------------------
                                                        Vice President


<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1997-2 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 15, 1997 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1997-2 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                      <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $67,043,526.74

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $7,900,812.67

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                              $2,830,000.00
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                       <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $3,500,264.45

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $412,492.23

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                $132,813.56

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (P)

                      MONTHLY CERTIFICATEHOLDERS' STATEMENT
                          Discover Card Master Trust I
                         Series 1997-3 Monthly Statement
                      Class A Certificate CUSIP #25466KBH1
                      Class B Certificate CUSIP #25466KBJ7


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of October 23, 1997 relating to
the Pooling and Servicing Agreement dated as of October 1, 1993 by and
between Greenwood Trust Company and U.S. Bank National Association, as
Trustee, the Trustee is required to prepare certain information each month
regarding current distributions to Certificateholders and the performances
of the Trust. The information for the Due Period and the Trust Distribution
Date listed above is set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
    Series  1997-3                                   Total           Interest       Principal
<S>                 <C>                         <C>               <C>             <C> 
        Class A      30 days at 5.786250000%     $4.821875000      $4.821875000    $0.000000000

        Class B      30 days at 5.966250000%     $4.971875000      $4.971875000    $0.000000000
</TABLE>
2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
<S>       <C>                                        <C>
    (a)   Aggregate Investor Interest                   $17,849,156,342.66
          Seller Interest                                $2,915,943,453.70

          Total Master Trust                            $20,765,099,796.36


    (b)   Group One Investor Interest                   $15,299,156,342.66

    (c)   Group Two Investor Interest                    $2,550,000,000.00

    (d)   Series 1997-3 Investor Interest                  $684,211,000.00

    (e)   Class A Investor Interest                        $650,000,000.00

          Class B Investor Interest                         $34,211,000.00
</TABLE>
3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                   Finance Charge            Principal             Yield
                                                    Collections             Collections          Collections

    (a)   Allocation of Collections between Investor and Seller
<S>      <C>                                    <C>                    <C>                        <C>

          Aggregate Investor Allocation           $283,731,192.36       $2,407,643,438.08           $0.00

          Seller                                   $33,570,521.31         $284,867,675.85           $0.00

    (b)   Group One Allocation                    $243,497,335.07       $2,066,233,028.83           $0.00

    (c)   Group Two Allocation                     $40,233,857.29         $341,410,409.25           $0.00

    (d)   Series 1997-3 Allocations                $10,788,258.27          $91,545,377.87           $0.00

    (e)   Class A Allocations                      $10,248,845.35          $86,968,108.98           $0.00

          Class B Allocations                         $539,412.92           $4,577,268.89           $0.00
</TABLE>


<PAGE>   2

4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                           Deposits into the
                              SPFAs This          SPFA        Deposit Deficit    Investment
                              Due Period         Balance           Amount          Income
<S>                            <C>               <C>               <C>            <C> 
    Series 1997-3               $0.00             $0.00             0.00            $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                     Total Payments
                               Amount Paid       Deficit Amount       Through This
                             This Due Period     This Due Period       Due Period
<S>                             <C>                  <C>                 <C> 
    Series 1997-3                 $0.00                $0.00              $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                     Deposits Into the
                                         SIFAs This
                                        DuePeriod               SIFA Balance
<S>                                  <C>                          <C> 
    Series 1997-3                     $3,304,311.57                $0.00
</TABLE>

7.  Pool Factors
    ------------
                                                           This Due Period

    Class A                                                     1.00000000

    Class B                                                     1.00000000

8.  Investor Charged-Off Amount
    ---------------------------

<TABLE>
<CAPTION>
                                                                 Cumulative
                                                            Investor Charged-Off
                                         This Due Period           Amount
<S>                                     <C>                        <C> 
    (a)   Group One                      $106,039,668.54            $0.00

    (b)   Group Two                       $17,521,279.61            $0.00

    (c)   Series 1997-3                    $4,698,134.91            $0.00

    (d)   Class A                          $4,463,228.16            $0.00

          Class B                            $234,906.75            $0.00
</TABLE>

9.   Investor Losses This Due Period
     -------------------------------
<TABLE>
<CAPTION>
                                                               Per $1,000 of
                                                             Original Invested
                                               Total             Principal
<S>                                           <C>                <C> 
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1997-3                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>


<PAGE>   3

10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                            <C>               <C> 
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1997-3                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total           Principal
<S>                                           <C>                <C> 
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1997-3                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
<S>                                                           <C> 
    (a)   Group One                                            $25,713,871.67

    (b)   Group Two                                             $4,250,000.00

    (c)   Series 1997-3                                         $1,140,351.66

    (d)   Class A                                               $1,083,333.33

          Class B                                                  $57,018.33
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                             As a Percentage
                                                                of Class A
                                           Total             Invested Amount
<S>                                  <C>                        <C> 
    Series 1997-3 Class B             $85,526,375.00             13.1579%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                              Shared Amount      Class B Amount
<S>                                               <C>           <C> 
     Maximum Amount                                $0.00         $51,315,825.00

     Available Amount                              $0.00         $51,315,825.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00                  $0.00
</TABLE>

<PAGE>   4
<TABLE>
15.  Delinquency Summary
     -------------------
<S>                                                          <C>
     End of Due Period Master Trust Receivables Outstanding   $21,086,742,705.80
</TABLE>
<TABLE>
<CAPTION>
                             Delinquent Amount             Percentage of Ending
     Payment Status           Ending Balance              Receivables Outstanding
<S>                         <C>                                   <C> 
     30-59 days              $577,732,852.19                       2.74%

     60-179 days             $943,399,940.65                       4.47%
</TABLE>


                                                  U.S. BANK NATIONAL ASSOCIATION
                                                  as Trustee


                                               BY:
                                                   ----------------------------
                                                         Vice President

<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1997-3 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 23, 1997 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1997-3 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                      <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $86,968,108.98

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                $10,248,845.35

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                              $3,134,218.75
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                       <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $4,577,268.89

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $539,412.92

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                $170,092.82

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (Q)

                         MONTHLY CERTIFICATEHOLDERS' STATEMENT
                             Discover Card Master Trust I
                            Series 1997-4 Monthly Statement
                        Class A Certificate CUSIP #25466KBK4
                        Class B Certificate CUSIP #25466KBL2


Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of October 31, 1997 relating to
the Pooling and Servicing Agreement dated as of October 1, 1993 by and
between Greenwood Trust Company and U.S. Bank National Association, as
Trustee, the Trustee is required to prepare certain information each month
regarding current distributions to Certificateholders and the performances
of the Trust. The information for the Due Period and the Trust Distribution
Date listed above is set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per
    -----------------------------------------------------------------
    $1000 of Class Initial Investor Interest)
    -----------------------------------------
<TABLE>
<CAPTION>
    Series  1997-4                                    Total         Interest      Principal
<S>                  <C>                        <C>              <C>           <C>  
        Class A      30 days at 5.726250000%     $4.771875000     $4.771875000  $0.000000000

        Class B      30 days at 5.906250000%     $4.921875000     $4.921875000  $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
<S>                                                    <C> 
    (a)   Aggregate Investor Interest                   $17,849,156,342.66
          Seller Interest                                $2,915,943,453.70

          Total Master Trust                            $20,765,099,796.36


    (b)   Group One Investor Interest                   $15,299,156,342.66

    (c)   Group Two Investor Interest                    $2,550,000,000.00

    (d)   Series 1997-4 Investor Interest                  $789,474,000.00

    (e)   Class A Investor Interest                        $750,000,000.00

          Class B Investor Interest                         $39,474,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                              Finance Charge         Principal          Yield
                                               Collections          Collections      Collections

    (a)   Allocation of Collections between Investor and Seller
<S>                                          <C>                <C>                    <C> 

          Aggregate Investor Allocation      $283,731,192.36     $2,407,643,438.08      $0.00

          Seller                              $33,570,521.31       $284,867,675.85      $0.00

    (b)   Group One Allocation               $243,497,335.07     $2,066,233,028.83      $0.00

    (c)   Group Two Allocation                $40,233,857.29       $341,410,409.25      $0.00

    (d)   Series 1997-4 Allocations           $12,469,957.34       $105,815,686.78      $0.00

    (e)   Class A Allocations                 $11,835,353.92       $100,430,664.55      $0.00

          Class B Allocations                    $634,603.42         $5,385,022.23      $0.00
</TABLE>

<PAGE>   2

4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                            Deposits into the
                               SPFAs This           SPFA     Deposit Deficit   Investment
                               Due Period         Balance        Amount          Income
<S>                              <C>              <C>            <C>            <C>  
    Series 1997-4                 $0.00            $0.00          0.00           $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                         Total Payments
                                    Amount Paid       Deficit Amount      Through This
                                  This Due Period    This Due Period       Due Period
<S>                                   <C>                <C>                 <C>  
    Series 1997-4                      $0.00              $0.00               $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                   Deposits Into the
                                      SIFAs This
                                       DuePeriod             SIFA Balance
<S>                                 <C>                        <C> 
    Series 1997-4                    $3,773,192.34              $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                            This Due Period
<S>                                                            <C> 
    Class A                                                      1.00000000

    Class B                                                      1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                 Cumulative
                                                            Investor Charged-Off
                                         This Due Period           Amount
<S>                                     <C>                        <C> 
    (a)   Group One                      $106,039,668.54            $0.00

    (b)   Group Two                       $17,521,279.61            $0.00

    (c)   Series 1997-4                    $5,430,491.24            $0.00

    (d)   Class A                          $5,154,130.36            $0.00

          Class B                            $276,360.88            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total             Principal
<S>                                           <C>                <C> 
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1997-4                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

<PAGE>   3

10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                           <C>                <C> 
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1997-4                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                           <C>                <C> 
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1997-4                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
<S>                                                      <C> 
    (a)   Group One                                       $25,713,871.67

    (b)   Group Two                                        $4,250,000.00

    (c)   Series 1997-4                                    $1,315,790.00

    (d)   Class A                                          $1,250,000.00

          Class B                                             $65,790.00
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                            As a Percentage
                                                               of Class A
                                             Total          Invested Amount
<S>                                     <C>                   <C> 
    Series 1997-4 Class B                $98,684,250.00        13.1579%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                            Shared Amount      Class B Amount
<S>                                              <C>          <C>
    Maximum Amount                                $0.00        $59,210,550.00

    Available Amount                              $0.00        $59,210,550.00

    Amount of Drawings on Credit Enhancement
      for this Due Period                         $0.00                 $0.00
</TABLE>

<PAGE>   4

15. Delinquency Summary
    -------------------
<TABLE>
<S>                                                             <C>
    End of Due Period Master Trust Receivables Outstanding       $21,086,742,705.80
</TABLE>

<TABLE>
<CAPTION>
                              Delinquent Amount            Percentage of Ending
    Payment Status             Ending Balance           Receivables Outstanding
<S>                           <C>                               <C> 
    30-59 days                 $577,732,852.19                   2.74%

    60-179 days                $943,399,940.65                   4.47%
</TABLE>

                                                  U.S. BANK NATIONAL ASSOCIATION
                                                  as Trustee

                                               BY:
                                                   ----------------------------
                                                         Vice President

<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1997-4 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of October 31, 1997 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1997-4 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                      <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                      $100,430,664.55

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                $11,835,353.92

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                              $3,578,906.25
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                       <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $5,385,022.23

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $634,603.42

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                $194,286.09

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (R)

                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1998-1 Monthly Statement
                   Class A Certificate CUSIP #25466KBM0
                   Class B Certificate CUSIP #25466KBN8

Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of January 14, 1998 relating to
the Pooling and Servicing Agreement dated as of October 1, 1993 by and
between Greenwood Trust Company and U.S. Bank National Association, as
Trustee, the Trustee is required to prepare certain information each month
regarding current distributions to Certificateholders and the performances
of the Trust. The information for the Due Period and the Trust Distribution
Date listed above is set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
    Series  1998-1                                   Total        Interest       Principal
<S>                  <C>                        <C>            <C>            <C> 
        Class A      30 days at 5.746250000%     $4.788541667   $4.788541667   $0.000000000

        Class B      30 days at 5.926250000%     $4.938541667   $4.938541667   $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
<S>                                                    <C> 
    (a)   Aggregate Investor Interest                   $17,849,156,342.66
          Seller Interest                                $2,915,943,453.70

          Total Master Trust                            $20,765,099,796.36

    (b)   Group One Investor Interest                   $15,299,156,342.66

    (c)   Group Two Investor Interest                    $2,550,000,000.00

    (d)   Series 1998-1 Investor Interest                  $368,422,000.00

    (e)   Class A Investor Interest                        $350,000,000.00

          Class B Investor Interest                         $18,422,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                Finance Charge     Principal        Yield
                                                 Collections      Collections     Collections

    (a)   Allocation of Collections between Investor and Seller
<S>                                          <C>               <C>                    <C> 

          Aggregate Investor Allocation      $283,731,192.36    $2,407,643,438.08      $0.00

          Seller                              $33,570,521.31      $284,867,675.85      $0.00

    (b)   Group One Allocation               $243,497,335.07    $2,066,233,028.83      $0.00

    (c)   Group Two Allocation                $40,233,857.29      $341,410,409.25      $0.00

    (d)   Series 1998-1 Allocations            $5,806,621.35       $49,272,953.38      $0.00

    (e)   Class A Allocations                  $5,521,049.81       $46,849,693.38      $0.00

          Class B Allocations                    $285,571.54        $2,423,260.00      $0.00
</TABLE>

<PAGE>   2

4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                         Deposits into the
                            SPFAs This           SPFA      Deposit Deficit   Investment
                            Due Period          Balance        Amount          Income
<S>                           <C>               <C>            <C>             <C> 
    Series 1998-1              $0.00             $0.00           0.00           $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                       Total Payments
                              Amount Paid          Deficit Amount       Through This
                            This Due Period       This Due Period        Due Period
<S>                             <C>                   <C>                  <C> 
    Series 1998-1                $0.00                 $0.00                $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                Deposits Into the
                                   SIFAs This
                                    DuePeriod               SIFA Balance
<S>                              <C>                          <C> 
    Series 1998-1                 $1,766,967.39                 $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                           This Due Period
<S>                                                            <C>
    Class A                                                     1.00000000

    Class B                                                     1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                 Cumulative
                                                            Investor Charged-Off
                                         This Due Period           Amount
<S>                                     <C>                       <C> 
    (a)   Group One                      $106,039,668.54            $0.00

    (b)   Group Two                       $17,521,279.61            $0.00

    (c)   Series 1998-1                    $2,528,702.02            $0.00

    (d)   Class A                          $2,404,339.63            $0.00

          Class B                            $124,362.39            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                           <C>                <C> 
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1998-1                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

<PAGE>   3

10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                           <C>                <C>
    (a)  Group One                             $0.00              $0.00

    (b)  Group Two                             $0.00              $0.00

    (c)  Series 1998-1                         $0.00              $0.00

    (d)  Class A                               $0.00              $0.00

         Class B                               $0.00              $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                             Per $1,000 of
                                                           Original Invested
                                               Total           Principal
<S>                                           <C>                <C> 
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1998-1                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
<S>                                                      <C> 
    (a)   Group One                                       $25,713,871.67

    (b)   Group Two                                        $4,250,000.00

    (c)   Series 1998-1                                      $614,036.66

    (d)   Class A                                            $583,333.33

          Class B                                             $30,703.33
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                            As a Percentage
                                                               of Class A
                                          Total             Invested Amount
<S>                                 <C>                        <C> 
    Series 1998-1 Class B            $46,052,750.00             13.1579%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                             Shared Amount   Class B Amount
<S>                                              <C>        <C> 
    Maximum Amount                                $0.00      $27,631,650.00

    Available Amount                              $0.00      $27,631,650.00

    Amount of Drawings on Credit Enhancement
      for this Due Period                         $0.00               $0.00
</TABLE>

<PAGE>   4
<TABLE>
15. Delinquency Summary
    -------------------
<S>                                                         <C>
    End of Due Period Master Trust Receivables Outstanding   $21,086,742,705.80
</TABLE>
<TABLE>
<CAPTION>
                            Delinquent Amount          Percentage of Ending
    Payment Status            Ending Balance         Receivables Outstanding
<S>                         <C>                              <C> 
    30-59 days               $577,732,852.19                  2.74%

    60-179 days              $943,399,940.65                  4.47%
</TABLE>

                                                  U.S. BANK NATIONAL ASSOCIATION
                                                  as Trustee

                                               BY:
                                                   ----------------------------
                                                         Vice President

<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1998-1 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of January 14, 1998 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-1 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                       <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $46,849,693.38

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $5,521,049.81

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                              $1,675,989.58
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                        <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $2,423,260.00

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $285,571.54

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                 $90,977.81

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                     EXHIBIT (S)

                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1998-2 Monthly Statement
                   Class A Certificate CUSIP #25466KBP3
                   Class B Certificate CUSIP #25466KBQ1

Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of March 4, 1998 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding
current distributions to Certificateholders and the performances of the
Trust. The information for the Due Period and the Trust Distribution Date
listed above is set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per
    -----------------------------------------------------------------
    $1000 of Class Initial Investor Interest)
    -----------------------------------------
<TABLE>
<CAPTION>
    Series  1998-2                                 Total          Interest       Principal
<S>                 <C>                        <C>             <C>            <C>  
        Class A      30 days at 5.800000000%    $4.833333333    $4.833333333   $0.000000000

        Class B      30 days at 5.950000000%    $4.958333333    $4.958333333   $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
<S>                                                    <C> 
    (a)   Aggregate Investor Interest                   $17,849,156,342.66
          Seller Interest                                $2,915,943,453.70

          Total Master Trust                            $20,765,099,796.36

    (b)   Group One Investor Interest                   $15,299,156,342.66

    (c)   Group Two Investor Interest                    $2,550,000,000.00

    (d)   Series 1998-2 Investor Interest                  $526,316,000.00

    (e)   Class A Investor Interest                        $500,000,000.00

          Class B Investor Interest                         $26,316,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                 Finance Charge         Principal          Yield
                                                  Collections          Collections       Collections

    (a)   Allocation of Collections between Investor and Seller
<S>                                             <C>                <C>                    <C> 

          Aggregate Investor Allocation          $283,731,192.36    $2,407,643,438.08      $0.00

          Seller                                  $33,570,521.31      $284,867,675.85      $0.00

    (b)   Group One Allocation                   $243,497,335.07    $2,066,233,028.83      $0.00

    (c)   Group Two Allocation                    $40,233,857.29      $341,410,409.25      $0.00

    (d)   Series 1998-2 Allocations                $8,313,304.90       $70,543,791.19      $0.00

    (e)   Class A Allocations                      $7,900,812.67       $67,043,526.74      $0.00

          Class B Allocations                        $412,492.23        $3,500,264.45      $0.00
</TABLE>

<PAGE>   2

4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                       Deposits into the
                          SPFAs This           SPFA        Deposit Deficit     Investment
                          Due Period          Balance          Amount            Income
<S>                        <C>               <C>              <C>               <C> 
    Series 1998-2           $0.00             $0.00            0.00              $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                    Total Payments
                              Amount Paid        Deficit Amount      Through This
                            This Due Period     This Due Period       Due Period
<S>                              <C>                <C>                 <C> 
    Series 1998-2                 $0.00              $0.00               $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                   Deposits Into the
                                       SIFAs This
                                       DuePeriod              SIFA Balance
<S>                                 <C>                    <C>
    Series 1998-2                    $2,547,150.17          $11,122,555.74
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                           This Due Period
<S>                                                            <C> 
    Class A                                                     1.00000000

    Class B                                                     1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                 Cumulative
                                                             Investor Charged-Off
                                         This Due Period           Amount
<S>                                     <C>                       <C> 
    (a)   Group One                      $106,039,668.54            $0.00

    (b)   Group Two                       $17,521,279.61            $0.00

    (c)   Series 1998-2                    $3,620,327.49            $0.00

    (d)   Class A                          $3,440,692.92            $0.00

          Class B                            $179,634.57            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                           <C>                <C> 
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1998-2                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

<PAGE>   3

10.  Reimbursement of Investor Losses This Due Period
     ------------------------------------------------
<TABLE>
<CAPTION>
                                                         Per $1,000 of
                                                       Original Invested
                                          Total            Principal
<S>                                      <C>                <C> 
  (a)Group One                            $0.00              $0.00

  (b)Group Two                            $0.00              $0.00

  (c)Series 1998-2                        $0.00              $0.00

  (d)Class A                              $0.00              $0.00

     Class B                              $0.00              $0.00
</TABLE>

11.  Aggregate Amount of Unreimbursed Investor Losses
     ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                                 Total        Principal
<S>                                               <C>            <C> 
  (a)Group One                                     $0.00          $0.00

  (b)Group Two                                     $0.00          $0.00

  (c)Series 1998-2                                 $0.00          $0.00

  (d)Class A                                       $0.00          $0.00

     Class B                                       $0.00          $0.00
</TABLE>

12.  Investor Monthly Servicing Fee Payable at the end of the Due Period
     -------------------------------------------------------------------
<TABLE>
<S>                                                      <C>
  (a)Group One                                            $25,713,871.67

  (b)Group Two                                             $4,250,000.00

  (c)Series 1998-2                                           $877,193.33

  (d)Class A                                                 $833,333.33

     Class B                                                  $43,860.00
</TABLE>

13.  Class Available Subordinated Amount at the end of the Due Period
     ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount
<S>                                         <C>               <C> 
     Series 1998-2 Class B                   $44,736,860.00     8.9474%
</TABLE>

14.  Total Available Credit Enhancement Amounts
     ------------------------------------------
<TABLE>
<CAPTION>
                                           Shared Amount     Class B Amount
<S>                                              <C>        <C> 
     Maximum Amount                                $0.00     $21,052,640.00

     Available Amount                              $0.00     $21,052,640.00

     Amount of Drawings on Credit Enhancement
       for this Due Period                         $0.00              $0.00
</TABLE>

<PAGE>   4

15.  Delinquency Summary
     -------------------
<TABLE>
<S>                                                             <C> 
     End of Due Period Master Trust Receivables Outstanding      $21,086,742,705.80
</TABLE>
<TABLE>
<CAPTION>
                         Delinquent Amount  Percentage of Ending
     Payment Status      Ending Balance     Receivables Outstanding
<S>                    <C>                      <C> 
     30-59 days         $577,732,852.19          2.74%

     60-179 days        $943,399,940.65          4.47%
</TABLE>

                                        U.S. BANK NATIONAL ASSOCIATION
                                        as Trustee

                                     BY: 
                                         ----------------------------
                                               Vice President
<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1998-2 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of March 4, 1998 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-2 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                       <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $67,043,526.74

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $7,900,812.67

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                                      $0.00
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                        <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $3,500,264.45

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $412,492.23

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                      $0.00

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                EXHIBIT (T)

                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1998-3 Monthly Statement
                   Class A Certificate CUSIP #25466KBR9
                   Class B Certificate CUSIP #25466KBS7

Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of March 25, 1998 relating to
the Pooling and Servicing Agreement dated as of October 1, 1993 by and
between Greenwood Trust Company and U.S. Bank National Association, as
Trustee, the Trustee is required to prepare certain information each month
regarding current distributions to Certificateholders and the performances
of the Trust. The information for the Due Period and the Trust Distribution
Date listed above is set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
    Series  1998-3                                  Total         Interest       Principal
<S>                 <C>                        <C>             <C>            <C> 
        Class A      30 days at 5.781250000%    $4.817708333    $4.817708333   $0.000000000

        Class B      30 days at 5.946250000%    $4.955208333    $4.955208333   $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
<S>                                                     <C>
    (a)   Aggregate Investor Interest                   $17,849,156,342.66
          Seller Interest                                $2,915,943,453.70

          Total Master Trust                            $20,765,099,796.36

    (b)   Group One Investor Interest                   $15,299,156,342.66

    (c)   Group Two Investor Interest                    $2,550,000,000.00

    (d)   Series 1998-3 Investor Interest                  $789,474,000.00

    (e)   Class A Investor Interest                        $750,000,000.00

          Class B Investor Interest                         $39,474,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                Finance Charge          Principal          Yield
                                                 Collections           Collections      Collections

    (a)   Allocation of Collections between Investor and Seller
<S>                                            <C>                  <C>                   <C> 

          Aggregate Investor Allocation        $283,731,192.36      $2,407,643,438.08      $0.00

          Seller                                $33,570,521.31        $284,867,675.85      $0.00

    (b)   Group One Allocation                 $243,497,335.07      $2,066,233,028.83      $0.00

    (c)   Group Two Allocation                  $40,233,857.29        $341,410,409.25      $0.00

    (d)   Series 1998-3 Allocations             $12,469,957.34        $105,815,686.78      $0.00

    (e)   Class A Allocations                   $11,835,353.92        $100,430,664.55      $0.00

          Class B Allocations                      $634,603.42          $5,385,022.23      $0.00
</TABLE>

<PAGE>   2

4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                      Deposits into the
                         SPFAs This             SPFA         Deposit Deficit     Investment
                         Due Period            Balance           Amount            Income
<S>                        <C>                 <C>               <C>              <C> 
    Series 1998-3           $0.00               $0.00             0.00             $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                     Total Payments
                             Amount Paid        Deficit Amount        Through This
                            This Due Period     This Due Period        Due Period
<S>                             <C>                 <C>                  <C> 
    Series 1998-3                $0.00               $0.00                $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                     Deposits Into the
                                         SIFAs This
                                         DuePeriod                SIFA Balance
<S>                                   <C>                           <C> 
    Series 1998-3                      $3,808,883.14                 $0.00
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                           This Due Period
<S>                                                            <C> 
    Class A                                                     1.00000000

    Class B                                                     1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                   Cumulative
                                                              Investor Charged-Off
                                         This Due Period           Amount
<S>                                     <C>                        <C> 
    (a)   Group One                      $106,039,668.54            $0.00

    (b)   Group Two                       $17,521,279.61            $0.00

    (c)   Series 1998-3                    $5,430,491.24            $0.00

    (d)   Class A                          $5,154,130.36            $0.00

          Class B                            $276,360.88            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                           <C>                <C>
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1998-3                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

<PAGE>   3

10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                           <C>                <C>
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1998-3                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                           <C>                <C>
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1998-3                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
<S>                                                     <C>
    (a)   Group One                                      $25,713,871.67

    (b)   Group Two                                       $4,250,000.00

    (c)   Series 1998-3                                   $1,315,790.00

    (d)   Class A                                         $1,250,000.00

          Class B                                            $65,790.00
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                          As a Percentage
                                                             of Class A
                                         Total            Invested Amount
<S>                                <C>                       <C> 
    Series 1998-3 Class B           $98,684,250.00            13.1579%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                              Shared Amount    Class B Amount
<S>                                              <C>         <C> 
    Maximum Amount                                $0.00       $59,210,550.00

    Available Amount                              $0.00       $59,210,550.00

    Amount of Drawings on Credit Enhancement
      for this Due Period                         $0.00                $0.00
</TABLE>

<PAGE>   4

15. Delinquency Summary
    -------------------
<TABLE>
<S>                                                            <C>
    End of Due Period Master Trust Receivables Outstanding      $21,086,742,705.80
</TABLE>
<TABLE>
<CAPTION>
                          Delinquent Amount        Percentage of Ending
    Payment Status          Ending Balance        Receivables Outstanding
<S>                      <C>                              <C> 
    30-59 days            $577,732,852.19                  2.74%

    60-179 days           $943,399,940.65                  4.47%
</TABLE>

                                                  U.S. BANK NATIONAL ASSOCIATION
                                                  as Trustee

                                               BY:
                                                   ----------------------------
                                                         Vice President

<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1998-3 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of March 25, 1998 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-3 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                       <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                      $100,430,664.55

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                $11,835,353.92

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                              $3,613,281.25
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                       <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $5,385,022.23

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $634,603.42

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                $195,601.89

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer



<PAGE>   1
                                                                EXHIBIT (U)

                    MONTHLY CERTIFICATEHOLDERS' STATEMENT
                        Discover Card Master Trust I
                       Series 1998-4 Monthly Statement
                   Class A Certificate CUSIP #25466KBT5
                   Class B Certificate CUSIP #25466KBU2

Trust Distribution Date: July 15, 1998         Due Period Ending:  June 30, 1998

Pursuant to the Series Supplement dated as of April 9, 1998 relating to the
Pooling and Servicing Agreement dated as of October 1, 1993 by and between
Greenwood Trust Company and U.S. Bank National Association, as Trustee, the
Trustee is required to prepare certain information each month regarding
current distributions to Certificateholders and the performances of the
Trust. The information for the Due Period and the Trust Distribution Date
listed above is set forth below:

1.  Payments for the benefit of Series Investors this Due Period (per $1000 of
    --------------------------------------------------------------------------
    Class Initial Investor Interest)
    --------------------------------
<TABLE>
<CAPTION>
    Series  1998-4                                   Total         Interest      Principal
<S>                  <C>                       <C>             <C>            <C>  
        Class A      30 days at 5.750000000%    $4.791666667    $4.791666667   $0.000000000

        Class B      30 days at 5.900000000%    $4.916666667    $4.916666667   $0.000000000
</TABLE>

2.  Principal Receivables at the end of the Due Period
    --------------------------------------------------
<TABLE>
<S>                                                    <C> 
    (a)   Aggregate Investor Interest                   $17,849,156,342.66
          Seller Interest                                $2,915,943,453.70

          Total Master Trust                            $20,765,099,796.36

    (b)   Group One Investor Interest                   $15,299,156,342.66

    (c)   Group Two Investor Interest                    $2,550,000,000.00

    (d)   Series 1998-4 Investor Interest                  $526,316,000.00

    (e)   Class A Investor Interest                        $500,000,000.00

          Class B Investor Interest                         $26,316,000.00
</TABLE>

3.  Allocation of Receivables Collected During the Due Period
    ---------------------------------------------------------
<TABLE>
<CAPTION>
                                                Finance Charge         Principal          Yield
                                                 Collections          Collections      Collections

    (a)   Allocation of Collections between Investor and Seller
<S>                                          <C>                  <C>                     <C> 

          Aggregate Investor Allocation       $283,731,192.36      $2,407,643,438.08       $0.00

          Seller                               $33,570,521.31        $284,867,675.85       $0.00

    (b)   Group One Allocation                $243,497,335.07      $2,066,233,028.83       $0.00

    (c)   Group Two Allocation                 $40,233,857.29        $341,410,409.25       $0.00

    (d)   Series 1998-4 Allocations             $8,313,304.90         $70,543,791.19       $0.00

    (e)   Class A Allocations                   $7,900,812.67         $67,043,526.74       $0.00

          Class B Allocations                     $412,492.23          $3,500,264.45       $0.00
</TABLE>

<PAGE>   2

4.  Information Concerning the Series Principal Funding Accounts ("SPFA")
    ---------------------------------------------------------------------
<TABLE>
<CAPTION>
                        Deposits into the
                            SPFAs This       SPFA      Deposit Deficit     Investment
                            Due Period     Balance        Amount              Income
<S>                          <C>           <C>            <C>                <C> 
    Series 1998-4                $0.00       $0.00          0.00               $0.00
</TABLE>

5.  Information Concerning Amount of Controlled Liquidation Payments
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                  Total Payments
                             Amount Paid       Deficit Amount     Through This
                            This Due Period    This Due Period     Due Period
<S>                                 <C>                <C>             <C> 
    Series 1998-4                     $0.00              $0.00           $0.00
</TABLE>

6.  Information Concerning the Series Interest Funding Accounts ("SIFA")
    --------------------------------------------------------------------
<TABLE>
<CAPTION>
                                       Deposits Into the
                                           SIFAs This
                                           DuePeriod        SIFA Balance
<S>                                    <C>                <C>  
    Series 1998-4                       $2,525,220.33      $8,080,705.06
</TABLE>

7.  Pool Factors
    ------------
<TABLE>
<CAPTION>
                                                           This Due Period
<S>                                                        <C> 
    Class A                                                 1.00000000

    Class B                                                 1.00000000
</TABLE>

8.  Investor Charged-Off Amount
    ---------------------------
<TABLE>
<CAPTION>
                                                                   Cumulative
                                                             Investor Charged-Off
                                         This Due Period           Amount
<S>                                     <C>                        <C> 
    (a)   Group One                      $106,039,668.54            $0.00

    (b)   Group Two                       $17,521,279.61            $0.00

    (c)   Series 1998-4                    $3,620,327.49            $0.00

    (d)   Class A                          $3,440,692.92            $0.00

          Class B                            $179,634.57            $0.00
</TABLE>

9.  Investor Losses This Due Period
    -------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                           <C>                <C>
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1998-4                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

<PAGE>   3

10. Reimbursement of Investor Losses This Due Period
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                           <C>                <C> 
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1998-4                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

11. Aggregate Amount of Unreimbursed Investor Losses
    ------------------------------------------------
<TABLE>
<CAPTION>
                                                              Per $1,000 of
                                                            Original Invested
                                               Total            Principal
<S>                                           <C>                <C> 
    (a)   Group One                            $0.00              $0.00

    (b)   Group Two                            $0.00              $0.00

    (c)   Series 1998-4                        $0.00              $0.00

    (d)   Class A                              $0.00              $0.00

          Class B                              $0.00              $0.00
</TABLE>

12. Investor Monthly Servicing Fee Payable at the end of the Due Period
    -------------------------------------------------------------------
<TABLE>
<S>                                                     <C> 
    (a)   Group One                                      $25,713,871.67

    (b)   Group Two                                       $4,250,000.00

    (c)   Series 1998-4                                     $877,193.33

    (d)   Class A                                           $833,333.33

          Class B                                            $43,860.00
</TABLE>

13. Class Available Subordinated Amount at the end of the Due Period
    ----------------------------------------------------------------
<TABLE>
<CAPTION>
                                                             As a Percentage
                                                               of Class A
                                                 Total       Invested Amount
<S>                                         <C>                <C> 
     Series 1998-4 Class B                   $44,736,860.00     8.9474%
</TABLE>

14. Total Available Credit Enhancement Amounts
    ------------------------------------------
<TABLE>
<CAPTION>
                                             Shared Amount   Class B Amount
<S>                                             <C>         <C> 
    Maximum Amount                                $0.00      $21,052,640.00

    Available Amount                              $0.00      $21,052,640.00

    Amount of Drawings on Credit Enhancement
      for this Due Period                         $0.00               $0.00
</TABLE>

<PAGE>   4

15. Delinquency Summary
    -------------------
<TABLE>
<S>                                                            <C> 
    End of Due Period Master Trust Receivables Outstanding      $21,086,742,705.80
</TABLE>
<TABLE>
<CAPTION>
                           Delinquent Amount           Percentage of Ending
    Payment Status          Ending Balance           Receivables Outstanding
<S>                        <C>                               <C>
    30-59 days              $577,732,852.19                   2.74%

    60-179 days             $943,399,940.65                   4.47%
</TABLE>

                                                  U.S. BANK NATIONAL ASSOCIATION
                                                  as Trustee

                                               BY:
                                                   ----------------------------
                                                         Vice President

<PAGE>   5


                    MASTER SERVICER'S CERTIFICATE STATEMENT

                          Discover Card Master Trust I

                        Series 1998-4 Monthly Statement

                                  CREDIT CARD
                           PASS-THROUGH CERTIFICATES

     The undersigned, a duly authorized representative of Greenwood Trust
Company ("Greenwood"), as Master Servicer pursuant to the Pooling & Servicing
Agreement dated as of October 1, 1993 (the"Pooling & Servicing Agreement") and
the Series Supplement, dated as of April 9, 1998 (the "Series Supplement") by
and between Greenwood and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Supplement Discover Card Master
Trust I, Series 1998-4 Master Trust Certificates for the Distribution Date
occurring on July 15, 1998:


<TABLE>
<S>                                                                                      <C>
 1.  Greenwood is Master Servicer under the Pooling and Servicing Agreement.

 2.  The undersigned is a Servicing Officer of Greenwood as Master Servicer.

 3.  The aggregate amount of Collections processed during the related Due
     Period is equal to                                                                    $3,009,812,827.61

 4.  The aggregate amount of Class A Principal Collections processed during
     the related Due Period is equal to                                                       $67,043,526.74

 5.  The aggregate amount of Class A Finance Charge Collections processed
     during the related Due Period is equal to                                                 $7,900,812.67

 6a. The aggregate amount of Class A Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

 6b. The aggregate amount of Class A Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

  7. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class A Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class A Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class A Investor Interest is equal to                                    $0.00

 8.  The sum of all amounts payable to the Class A Certificateholders
     on the current Distribution Date is equal to                                                      $0.00
</TABLE>


<PAGE>   6


<TABLE>
<S>                                                                                        <C>
 9.  The aggregate amount of Class B Principal Collections processed during
     the related Due Period is equal to                                                        $3,500,264.45

10.  The aggregate amount of Class B Finance Charge Collections processed
     during the related Due Period is equal to                                                   $412,492.23

11a. The aggregate amount of Class B Principal Collections recharacterized as
     Series Yield Collections during the related Due Period is equal to                                $0.00

11b. The aggregate amount of Class B Additional Funds for this Distribution
     date is equal to                                                                                  $0.00

 12. The amount of drawings under the Credit Enhancement required to be
     made on the related Drawing Date pursuant to the Series Supplement:

     (a)  with respect to the Class B Required Amount Shortfall                                        $0.00
          is equal to

     (b)  with respect to the Class B Cumulative Investor Charged-Off                                  $0.00
          Amount is equal to

     (c)  with respect to the Class B Investor Interest is equal to                                    $0.00

13.  The sum of all amounts payable to the Class B Certificateholders
     on the current Distribution Date is equal to                                                      $0.00

14.  Attached hereto is a true copy of the statement required to be delivered by
     the Master Servicer on the date of this Certificate to the Trustee pursuant to
     Section 16 of the Series Supplement.
</TABLE>

     IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 15th day of July, 1998.



                           GREENWOOD TRUST COMPANY
                                as Master Servicer

                           By:
                              -------------------------
                           Vice President, Director of Accounting,
                           and Treasurer




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