1 Page 15 of 18 MET-COIL SYSTEMS CORPORATION EXHIBIT 11 - COMPUTATION OF BASIC AND DILUTED EARNINGS PER SHARE (In thousands, except per share amounts) Three Months Ended Nine Months Ended February 28, February 28, 1998 1997 1998 1997 - ----------------------------------------------------------------------------------------------------------------------- Common shares outstanding, beginning of period 3,116 3,127 3,152 3,031 Weighted average of common shares issued (purchased) 1 12 (29) 97 - ----------------------------------------------------------------------------------------------------------------------- WEIGHTED AVERAGE SHARES OUTSTANDING (BASIC) 3,117 3,139 3,123 3,128 ======================================================================================================================= Weighted average of dilutive shares attributable to: Stock options granted, computed using the treasury stock method 77 0 69 0 Convertible preferred stock, computed using the "if converted" method 0 0 0 0 - ----------------------------------------------------------------------------------------------------------------------- WEIGHTED AVERAGE NUMBER OF SHARES (DILUTED) 3,194 3,139 3,192 3,128 ======================================================================================================================= Net income (loss) $437 ($1,242) $1,276 ($513) Preferred stock dividends and accretion 160 117 480 351 - ----------------------------------------------------------------------------------------------------------------------- Net income (loss) applicable to common stock $277 ($1,359) $796 ($864) ======================================================================================================================= Earnings (loss) per share: Basic $0.09 ($0.43) $0.25 ($0.28) Diluted $0.09 ($0.43) $0.25 ($0.28)