REPORT OF INDEPENDENT ACCOUNTANTS ON FINANCIAL STATEMENT SCHEDULE To the Board of Directors of Engineered Support Systems, Inc. Our audits of the consolidated financial statements referred to in our report dated December 7, 2000 appearing in the Annual Report to Shareholders of Engineered Support Systems, Inc. (which report and consolidated financial statements are incorporated by reference in this Annual Report on Form 10-K) also include an audit of the financial statement schedule listed in Item 14(a)(2) of this Form 10-K. In our opinion, this financial statement schedule presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. /s/PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP St. Louis, Mo. December 7, 2000 Engineered Support Systems, Inc. Schedule II - Valuation and Qualifying Accounts For the Years Ended October 31, 2000, 1999 and 1998 (in thousands) Additions ----------------------------- Balance at Charged to Charged to Balance beginning costs and other at end Description of period expenses accounts Deductions of period ----------- ---------- ---------- ---------- ---------- ---------- Year ended October 31, 2000 Allowance for doubtful accounts $264 $ 112 $ 0 $136 $240 Inventory reserves 548 (462) 0 0 86 Year ended October 31, 1999 Allowance for doubtful accounts $273 $ (54) $179 $134 $264 Inventory reserves 157 31 360 0 548 Year ended October 31, 1998 Allowance for doubtful accounts $283 $ 2 $ 0 $ 12 $273 Inventory reserves 359 (202) 0 0 157