Nine months' Three months' Nine Months Ended Three Months ended weighting factor weighting factor September 30, September 30, (in months) (in months) 1996 1995 1996 1995 1996 1995 1996 1995 ---- ---- ---- ---- ---- ---- ---- ---- Issuance of common stock, June 1993 375,000 375,000 375,000 375,000 9 6 3 3 Sale of common stock, October 1993 125,000 125,000 125,000 125,000 9 6 3 3 Sale of common stock, March 1995 1,250,000 shares 1,250,000 972,278 1,250,000 1,250,000 9 7 3 3 Shares issued upon exercise of options and warrants 109,506 -- 247,411 -- see below see below SAB 83 shares - see below -- 35,222 -- -- 9 2 0 0 --------- --------- --------- --------- Common stock and equivalents 1,859,506 1,507,500 1,997,411 1,750,000 ========= ========= ========= ========= Computation of weighted average number of shares issued upon exercise of options and warrants: Nine months' Three months' weighting factor weighting factor Shares (in days) (in days) Date Issued 1996 1996 - ---- ------ ---- ---- 5/1/96 12,500 6,944 12,500 6/1/96 200,000 88,889 200,000 6/3/96 12,500 5,417 12,500 6/7/96 4,000 1,674 4,000 6/18/96 4,000 1,511 4,000 6/18/96 6,000 2,267 6,000 7/8/96 2,500 759 2,278 7/9/96 2,000 600 1,800 8/22/96 7,500 1,444 4,333 9/18/96 200,000 8,889 26,667 ------- ------- Total 109,506 247,411 ======= ======= SAB 83 Calculation (treasury stock method) June, 1995 Incremental Options/Warrants Price/Share Proceeds Shares Options issued in December, 1994 360,000 $3.75 1,350,000 --------- IPO price 5.00 Shares assumed repurchased 270,000 90,000 Warrants issued in December, 1994 137,500 $2.50 343,750 IPO price 5.00 Shares assumed repurchased 68,750 68,750 ------- Total SAB 83 shares considered outstanding 158,750 ======= Page 15