EXHIBIT 12 ENZO BIOCHEM, INC. COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Years ended July 31, 1995, 1994, 1993, 1992 and 1991
1995 1994 1993 1992 1991 ---- ---- ---- ---- ---- Fixed charges: Interest (including capitalized interest and amortization of deferred financing costs of $0 and $0 in 1995, $0 and $0 in 1994, $0 and $2,400 in 1993, $450,000 and $69,000 in 1992, and $1,598,000 and $167,000 in 1991, respectively) $136,000 $114,000 $256,000 $2,273,000 $5,154,000 Portion of rental expense representative of interest 377,000 369,000 346,000 353,000 438,000 ----------- ---------- ----------- ---------- ------------ Total fixed charges $513,000 $483,000 $602,000 $2,626,000 $5,592,000 ----------- ---------- ----------- ---------- ------------ ----------- ---------- ----------- ---------- ------------ Earnings Income (loss) before provision (benefit) for taxes on income and extraordinary items $9,749,000 $2,156,000 $(6,324,000) $(1,103,000) $(10,764,000) Extraordinary items -- 150,000 (466,000) 572,000 (790,000) ----------- ---------- ----------- ---------- ------------ 9,749,000 2,306,000 (6,790,000) (531,000) (11,554,000) Total fixed charges 513,000 483,000 602,000 2,626,000 5,592,000 Less capitalized interest -- -- -- (450,000) (1,598,000) ----------- ---------- ----------- ---------- ------------ Total earnings (loss) $10,262,000 $2,789,000 $(6,188,000) $1,645,000 $(7,560,000) ----------- ---------- ----------- ---------- ------------ Deficiency of earnings to cover fixed charges -- -- $(6,790,000) $(981,000) $(13,152,000) ----------- ---------- ----------- ---------- ------------ ----------- ---------- ----------- ---------- ------------ Ratio of earnings to cover fixed charges 20.00 5.77 -- -- -- ----------- ---------- ----------- ---------- ------------ ----------- ---------- ----------- ---------- ------------
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