ABATIX ENVIRONMENTAL CORP. AND SUBSIDIARY Computation of Re Per Share Earnings Three Months Ended March 31, -------------------------------------- 1996 1995 ---------------- ----------------- Average shares outstanding: Primary: Common shares outstanding, beginning of period 2,159,214 2,319,748 Weighted average number of shares issued 4,222 8,308 Weighted average number of shares acquired (37,219) (63,500) Dilutive stock options and warrants, based on the treasury stock method using average market prices 43,040 19,322 ---------------- ----------------- Total 2,169,257 2,283,878 ================ ================= Fully Diluted: Common shares outstanding, beginning of period 2,159,214 2,319,748 Weighted average number of shares issued 4,222 8,308 Weighted average number of shares acquired (37,219) (63,500) Dilutive stock options and warrants, based on the treasury stock method using the market price at the end of the period if higher than the average market price 50,817 29,930 ---------------- ----------------- Total 2,177,034 2,294,486 ================ ================= Earnings: Earnings from continuing operations $ 207,734 $ 114,874 Earnings from discontinued operations 21,545 - ---------------- ----------------- Net earnings $ 229,279 $ 114,874 ================ ================= Primary earnings per common and common equivalent share: Earnings from continuing operations $ .10 $ .05 Earnings from discontinued operations .01 - ---------------- ----------------- Net earnings $ .11 $ .05 ================ ================= Fully diluted earnings per common and common equivalent share: Earnings from continuing operations $ .10 $ .05 Earnings from discontinued operations .01 - ---------------- ----------------- Net earnings $ .11 $ .05 ================ =================