EXHIBIT 12 TEXAS OLEFINS COMPANY, SUBSIDIARIES AND AFFILIATE COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (IN THOUSANDS, EXCEPT RATIO) (UNAUDITED) FOR THE FISCAL YEAR ENDED MAY 31, TWELVE ONE MONTH ------------------------------------------ MONTHS ENDED ENDED 1992 1993 1994 1995 MAY 31, 1996 JUNE 30, 1996 --------- --------- --------- --------- ------------- -------------- Income (loss) before income taxes and minority interest.................. $ 63,498 $ 41,081 $ 52,303 $ 49,268 $24,508 $1,988 Interest expense..................... 1,145 1,087 663 475 2,343 98 Interest portion of rental expense... 1,670 1,630 1,430 1,470 1,600 140 --------- --------- --------- --------- ------------- -------------- Earnings....................... $ 66,313 $ 43,798 $ 54,396 $ 51,213 $28,451 $2,226 ========= ========= ========= ========= ============= ============== Fixed Charges: Interest expense................... $ 1,145 $ 1,087 $ 663 $ 475 $ 2,343 $ 98 Interest portion of rental expense.......................... 1,670 1,630 1,430 1,470 1,600 140 --------- --------- --------- --------- ------------- -------------- Total fixed charges............ $ 2,815 $ 2,717 $ 2,093 $ 1,945 $ 3,943 $ 238 ========= ========= ========= ========= ============= ============== Ratio of earnings to fixed charges.......................... 23.6x 16.1x 26.0x 26.3x 7.2x(2) 9.4x SIX MONTHS SIX MONTHS ENDED ENDED DECEMBER 31, 1995 DECEMBER 31, 1996 ------------------ ------------------ Income (loss) before income taxes and minority interest.................. $ 24,342 $ (5,772) Interest expense..................... 1,565 17,367 Interest portion of rental expense... 800 750 -------- -------- Earnings....................... $ 26,707 $ 12,345 ======== ======== Fixed Charges: Interest expense................... $ 1,565 $ 17,367 Interest portion of rental expense.......................... 800 750 -------- -------- Total fixed charges............ $ 2,365 $ 18,117 ======== ======== Ratio of earnings to fixed charges.......................... 11.3x -- (1) PRO FORMA PRO FORMA PRO FORMA TWELVE ONE MONTH SIX MONTHS MONTHS ENDED ENDED ENDED MAY 31, 1996 JUNE 30, 1996 DECEMBER 31, 1996 ------------- -------------- ------------------ Loss before income taxes and minority interest........................... $ (10,400) $ (1,700) $ (6,100) Interest expense..................... 32,700 2,700 17,700 Interest portion of rental expense... 1,600 140 750 ------------- -------------- ------------------ Earnings...................... $ 23,900 $ 1,140 $ 12,350 ============= ============== ================== Fixed Charges: Interest expense................... $ 32,700 $ 2,700 $ 17,700 Interest portion of rental expense......................... 1,600 140 750 ------------- -------------- ------------------ Total fixed charges........... $ 34,300 $ 2,840 $ 18,450 ============= ============== ================== Ratio of earnings to fixed charges......................... -- (1) -- (1) -- (1) ============= ============== ================== - ------------ (1) For the six months ended December 31, 1996, the pro forma twelve months ended May 31, 1996, the pro forma one month ended June 30, 1996 and the pro forma six months ended December 31, 1996, earnings were insufficient to cover fixed charges in the amount of $(5.8) million, $(10.4) million, $(1.7) million and $(6.1) million, respectively. (2) For the twelve months ended May 31, 1996, income before taxes and minority interest includes a $12.6 million non-cash provision for the impairment of certain non-strategic properties which TPC intends to sell.