EXHIBIT 11 NATIONAL SANITARY SUPPLY COMPANY <F1> COMPUTATION OF EARNINGS PER SHARE (a) (UNAUDITED) Three Months Ended Nine Months Ended (thousands, except per share data) September 30, September 30, - - ---------------------------------- ------------------ ----------------- 1994 1993 1994 1993 ------- ------- ------- ------- Computation of Earnings Per Common and Common Equivalent Share Net Income $ 1,654 $ 1,509 $ 3,332 $ 2,960 ======= ======= ======= ======= Average Number of Shares of Common Stock Outstanding 5,982 5,899 5,960 5,892 Incremental Effect of Unexercised Stock Options 94 122 102 97 ------- ------- ------- ------- Average Number of Shares of Common Stock and Common Stock Equivalents Outstanding 6,076 6,021 6,062 5,989 ======= ======= ======= ======= Earnings per Common and Common Equivalent Share $ 0.27 $ 0.25 $ 0.55 $ 0.49 ======= ======= ======= ======= Computation of Earnings Per Common Share Assuming Full Dilution Net Income $ 1,654 $ 1,509 $ 3,332 $ 2,960 ======= ======= ======= ======= Average Number of Shares of Common Stock Outstanding 5,982 5,899 5,960 5,892 Incremental Effect of Unexercised Stock Options 114 126 105 122 ------- ------- ------- ------- Average Number of Shares of Common Stock assuming Full Dilution 6,096 6,025 6,065 6,014 ======= ======= ======= ======= Earnings Per Common Share Assuming Full Dilution $ 0.27 $ 0.25 $ 0.55 $ 0.49 ======= ======= ======= ======= <F1> (a) This calculation is submitted in accordance with the Securities Exchange Act of 1934. Because the incremental effect of unexercised stock options results in dilution of less than 3%, the per share data presented in the consolidated statement of income excludes the impact of common stock equivalents. E-1 Page 10 Of 10