FORM 24F-2
Annual Notice of Securities Sold
Pursuant to Rule 24f-2
1. Name and address of issuer:
Merrill Lynch, Pierce, Fenner & Smith Incorporated
P.O. Box 9051
Princeton, N.J. 08543-9051
2. The name of each series or class of securities for which
this Form is filed (If the Form is being filed for all
series and classes of securities of the issuer, check
the box but do not list series or classes): [ ]
Municipal Investment Trust Fund Monthly Payment Series 600 Defined Asset Funds
3. Investment Company Act File Number: 811-1777
Securities Act File Number: 333-13265
4(a). Last day of fiscal year for which this Form is filed:
December 31, 1999
4(b). [ ] Check box if this Form is being filed late
(i.e., more than 90 calendar days after the end of
the issuer's fiscal year). (See Instruction A.2)
Note: If the Form is being filed late, interest must be paid
on the registration fee due.
4(c). [ ] Check box if this is the last time the issuer
will be filing this Form.
5. Calculation of registration fee:
(i) Aggregate sale price of securities
sold during the fiscal year pursuant
to section 24(f): $301,372.89
(ii) Aggregate price of securities redeemed
or repurchased during the fiscal year: $1,571,265.65
(iii) Aggregate price of securities redeemed
or repurchased during any prior fiscal
year ending no earlier than October 11,
1995 that were not previously used to
reduce registration fees payableto the
Commission: $217,947.06
(iv) Total available redemption credits
[add Items 5(ii) and 5(iii): -$1,789,212.71
(v) Net sales - if Item 5(i) is greater
than Item 5(iv)[subtract Item 5(iv)
from Item 5(i)]: $0.00
(vi) Redemption credits available for use
in future years - If Item 5(i) is less
than Item 5(iv) [subtract Item 5(iv)
from Item 5(i)]: $(1,487,839.82)
(vii) Multiplier for determining registration
fee (See Instruction C.9): x_.000264
(viii)Registration fee due [multiply Item
5(v) by Item 5(vii)] (enter ''0''
if no fee is due): =$0.00
___________
6. Prepaid Shares
If the response to Item 5(i) was determined by deducting an amount
of securities that were registered under the Securities Act of 1933
pursuant to rule 24e-2 as in effect before October 11, 1997, then
report the amount of securities (number of shares or other units)
deducted here: 0. If there is a number of shares or other units that
were registered pursuant to rule 24e-2 remaining unsold at the end of
the fiscal year for which this form is filed that are available for
use by the issuer in future fiscal years, then state that number
here: 0.
7. Interest due - if this Form is being filed more than 90 days after the
end of the issuer's fiscal year (see Instruction D): +$0.00
8. Total of the amount of the registration fee due plus any interest due
[line 5(viii) plus line 7]: =$0.00
9. Date the registration fee and any interest payment was sent to the
Commission's lockbox depository: n/a
Method of Delivery:
[ ] Wire Transfer
[ ] Mail or other means
SIGNATURES
This report has been signed below by the following persons
on behalf of the issuer and in the capacities and on the
dates indicated.
By (Signature and Title) *
by Merrill Lynch, Pierce, Fenner & Smith
Incorporated, Agent for the Sponsors
By /s/ J. David Meglen
Vice President
Date March 13, 2000
*Please print the name and title of the signing officer below
the signature.
