1 EXHIBIT 99(A) Calculation of weighted average shares outstanding. Three Months Ended March 31, ------------------------------------------- 1995 1996 ----------------- ----------------- Shares outstanding during period 14,934,847 15,234,161 Treasury stock - (652,912) Dilutive effect of stock options, (using the treasury stock method) 176,153 200,751 ------------ ----------- Weighted Average Common and Common Equivalent Shares Outstanding 15,111,000 14,782,000 ============ ===========