CANTEL INDUSTRIES, INC. Computation of Earnings per Share Exhibit 11 For the Years Ended July 31, ---------------------------------- PRIMARY 1995 1994 1993 ---------- ---------- ---------- Weighted average number of shares outstanding 2,747,533 2,592,597 2,033,080 Dilutive effect of options and warrants using the modified treasury stock method and average market price for the period 394,806 418,629 - ---------- ---------- ---------- Weighted average number of shares and common stock equivalents assuming no redemption or conversion of preferred stocks 3,142,339 3,011,226 2,033,080 ---------- ---------- ---------- ---------- ---------- ---------- Income from continuing operations before extraordinary gain and dividends on preferred stocks $1,001,000 $1,246,000 $ 88,000 Dividends on preferred stocks - (314,000) (1,185,000) ---------- ---------- ---------- Income (loss) from continuing operations before extraordinary gain assuming no redemption or conversion of preferred stocks 1,001,000 932,000 (1,097,000) Discontinued operations - 562,000 (24,000) Extraordinary gain on extinguishment of debt - 1,211,000 - ---------- ---------- ---------- Net income (loss) attributable to common stock $1,001,000 $2,705,000 $(1,121,000) ---------- ---------- ---------- ---------- ---------- ---------- Primary earnings per share assuming no conversion or redemption of preferred stocks: Continuing operations $0.32 $0.31 $(0.54) Discontinued operations - 0.19 $(0.01) Extraordinary gain on extinguishment of debt - 0.40 - ----- ----- ------- Net income (loss) $0.32 $0.90 ($0.55) ----- ----- ------- ----- ----- ------- CANTEL INDUSTRIES, INC. Computation of Earnings per Share Exhibit 11 For the Years Ended July 31, ---------------------------------- FULLY DILUTED 1995 1994 1993 ----------- ---------- ---------- Weighted average number of shares outstanding 2,747,533 2,592,597 2,465,400 Dilutive effect of options and warrants using the modified treasury stock method and the higher of the period-end or average market price for the period 398,003 462,261 - ----------- ---------- ---------- Weighted average number of shares and common stock equivalents assuming no redemption or conversion of preferred stocks 3,145,536 3,054,858 2,465,400 ----------- ---------- ---------- ----------- ---------- ---------- Income from continuing operations before extraordinary gain and dividends on preferred stocks $1,001,000 $1,246,000 $ 88,000 Dividends on preferred stocks (1) - (314,000) (933,000) ----------- ---------- ---------- Income (loss) from continuing operations before extraordinary gain assuming no redemption or conversion of preferred stocks 1,001,000 932,000 (845,000) Discontinued operations - 562,000 (24,000) Extraordinary gain on extinguishment of debt - 1,211,000 - ----------- ---------- ---------- Net income (loss) attributable to common stock (1) $1,001,000 $2,705,000 $(869,000) ----------- ---------- ---------- ----------- ---------- ---------- Fully diluted earnings per share assuming no redemption or conversion of preferred stocks (1): Continuing operations $0.32 $0.31 $(0.34) Discontinued operations - 0.18 $(0.01) Extraordinary gain on extinguishment of debt - 0.40 - ----- ----- ------- Net income (loss) $0.32 $0.89 ($0.35) ----- ----- ------- ----- ----- ------- (1) Includes the adding back, in fiscal 1993, of Series B Preferred Stock dividends of $100,000 and Series B Preferred Stock imputed dividends of $152,000 to reflect the conversion of the Series B Preferred Stock into 600,000 shares of common stock as of the beginning of the fiscal year.