EXHIBIT 11 COMPUTATION OF NET EARNINGS PER COMMON AND COMMON EQUIVALENT SHARE For the three months ended November 30, 1997 and November 30, 1996 November November 1997 1996 PRIMARY EARNINGS PER SHARE: Shares* Average shares outstanding 34,478,79 34,142,3 5 40 Net average additional shares outstanding assuming dilutive stock options exercised and proceeds used to purchase treasury stock at average market price 1,582,953 1,407,20 8 Average number of common and common equivalent shares outstanding 36,061,74 35,549,5 8 48 Net Earnings Net earnings for primary earnings per $2,712,00 $2,065,0 share 0 00 Primary Earnings Per Share* $0.08 $0.06 *Earnings per share and all share amounts have been adjusted to reflect the two-for-one split of the Common Stock to holders of record July 25, 1997.