<PAGE>
EXHIBIT B
<PAGE>
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned, John Tomes, as Vice
President of Wynnchurch Management, Inc., the general partner of Wynnchurch
Partners, L.P., being the general partner of Wynnchurch Capital Partners, L.P.,
has made, constituted and appointed, and by these presents does make, constitute
and appoint, Alisa Burns Hoy, its true and lawful attorney-in-fact and agent,
for Wynnchurch Capital Partners, L.P. and in its name, place and stead to
execute, acknowledge, deliver and file any and all filings required by Section
13 and Section 16 of the Securities Exchange Act of 1934, as amended, and the
rules and regulations promulgated thereunder, including, but not limited to,
Schedules 13D and 13G, Forms 3, Forms 4 and Forms 5, hereby ratifying and
confirming all that said attorney-in-fact and agent may do or cause to be done
by virtue hereof.
The validity of this Power of Attorney shall not be affected in any
manner by reason of the execution, at any time, of other powers of attorney by
the undersigned in favor of persons other than the attorney-in-fact named
herein.
WITNESS THE EXECUTION HEREOF this 10th day of July, 2000 by John Tomes, on
behalf and as Vice President of Wynnchurch Management, Inc., the general partner
of Wynnchurch Partners, L.P., being the general partner of Wynnchurch Capital
Partners, L.P.
WYNNCHURCH CAPITAL PARTNERS, L.P.
By: Wynnchurch Partners, L.P.
Its: General Partner
By: Wynnchurch Management, Inc.
Its: General Partner
By: /s/ John Tomes
---------------------------
John Tomes
Its: Vice President
STATE OF ILLINOIS)
COUNTY OF COOK )
/s/ Jamie Jedrus
-----------------
Notary Public
<PAGE>
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned, John Tomes, as Vice
President of Wynnchurch GP Canada, Inc., the general partner of Wynnchurch
Partners Canada, L.P., being the general partner of Wynnchurch Capital Partners
Canada, L.P., has made, constituted and appointed, and by these presents does
make, constitute and appoint, Alisa Burns Hoy, its true and lawful attorney-in-
fact and agent, for Wynnchurch Capital Partners Canada, L.P. and in its name,
place and stead to execute, acknowledge, deliver and file any and all filings
required by Section 13 and Section 16 of the Securities Exchange Act of 1934, as
amended, and the rules and regulations promulgated thereunder, including, but
not limited to, Schedules 13D and 13G, Forms 3, Forms 4 and Forms 5, hereby
ratifying and confirming all that said attorney-in-fact and agent may do or
cause to be done by virtue hereof.
The validity of this Power of Attorney shall not be affected in any manner
by reason of the execution, at any time, of other powers of attorney by the
undersigned in favor of persons other than the attorney-in-fact named herein.
WITNESS THE EXECUTION HEREOF this 10th day of July, 2000 by John Tomes, on
behalf and as Vice President of Wynnchurch GP Canada, Inc., the general partner
of Wynnchurch Partners Canada, L.P., being the general partner of Wynnchurch
Capital Partners Canada, L.P.
WYNNCHURCH CAPITAL PARTNERS CANADA, L.P.
By: Wynnchurch Partners Canada, L.P.
Its: General Partner
By: Wynnchurch GP Canada, Inc.
Its: General Partner
By: /s/ John Tomes
------------------------------------
John Tomes
Its: Vice President
STATE OF ILLINOIS)
COUNTY OF COOK )
/s/ Jamie Jedrus
----------------
Notary Public
