1 EXHIBIT 11 ARBOR DRUGS, INC. AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE Three Months Ended (In thousands, except per share data) October 31, ------------------- 1997 1996 ---- ---- A. Net Income $7,779 (a) $6,393 (a) ========= ========= Weighted average number of common shares outstanding 39,446 37,715 Effect of the issuance of stock options and assumed exercise of stock options at prices which are lower than the average market price of the common shares during the period, using the treasury stock method 1,532 1,092 --------- --------- B. Average number of common shares and common equivalent shares for primary earnings per share 40,978 (a) 38,807 (a) ========= ========= Weighted average number of common shares outstanding 39,446 37,715 Effect of the issuance of stock options and assumed exercise of options at prices which are lower than the market price of common stock at end of the period when such price is higher than average market price of the common shares during the period, using the treasury stock method 1,665 1,209 --------- --------- C. Average number of common shares and common equivalent shares for fully diluted earnings per share 41,111 (a) 38,924 (a) ========= ========= Primary earnings per share: A / B $0.19 (a) $0.16 (a) ========= ========= Fully diluted earnings per share: A / C $0.19 (a) $0.16 (a) ========= ========= (a) These amounts agree with the related amounts in the Consolidated Statements of Income. All share amounts have been restated to give effect to the stock split declared on November 19, 1996 and distributed on December 17, 1996.