EXHIBIT 11 NATIONAL SANITARY SUPPLY COMPANY <F1> COMPUTATION OF EARNINGS PER SHARE (a) (UNAUDITED) Three Months Ended Six Months Ended (thousands, except per share data) June 30, June 30, - ---------------------------------- -------------------- ------------------- 1995 1994 1995 1994 ------- ------- ------- ------- Computation of Earnings Per Common and Common Equivalent Share Net Income $ 1,370 $ 1,104 $ 2,129 $ 1,678 ======= ======= ======= ======= Average Number of Shares of Common Stock Outstanding 6,073 5,961 6,062 5,949 Incremental Effect of Unexercised Stock Options 75 104 81 106 ------- ------- ------- ------- Average Number of Shares of Common Stock and Common Stock Equivalents Outstanding 6,148 6,065 6,143 6,055 ======= ======= ======= ======= Earnings per Common and Common Equivalent Share $ 0.22 $ 0.18 $ 0.35 $ 0.28 ======= ======= ======= ======= Computation of Earnings Per Common Share Assuming Full Dilution Net Income $ 1,370 $ 1,104 $ 2,129 $ 1,678 ======= ======= ======= ======= Average Number of Shares of Common Stock Outstanding 6,073 5,961 6,062 5,949 Incremental Effect of Unexercised Stock Options 76 111 82 109 ------- ------- ------- ------- Average Number of Shares of Common Stock Assuming Full Dilution 6,149 6,072 6,144 6,058 ======= ======= ======= ======= Earnings Per Common Share Assuming Full Dilution $ 0.22 $ 0.18 $ 0.35 $ 0.28 ======= ======= ======= ======= (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