EXHIBIT 11 IPI, INC. AND SUBSIDIARIES STATEMENT REGARDING COMPUTATION OF EARNINGS PER SHARE (In Thousands, Except Per Share Amounts) Three Months Ended Six Months Ended May 31, May 31, ------------------ ------------------ 1999 1998 1999 1998 ---- ---- ---- ---- Net Income $ 545 $ 557 $ 919 $ 945 Weighted average number of issued shares outstanding 4,734 4,734 4,734 4,734 Shares used in computation of basic earnings per common stock 4,734 4,734 4,734 4,734 ====== ====== ====== ====== Dilutive effect of outstanding stock options and stock warrants after application of treasury stock method 0 12 0 11 ------ ------ ------ ------ Common and common equivalent shares outstanding--diluted 4,734 4,746 4,734 4,745 ====== ====== ====== ====== Basic and diluted earnings per common share $ .11 $ .12 $ .19 $ .20 ====== ====== ====== ====== 11