EXHIBIT 11 IPI, INC. AND SUBSIDIARIES STATEMENT REGARDING COMPUTATION OF EARNINGS PER SHARE (In Thousands, Except Per Share Amounts) Three Months Ended Nine Months Ended August 31, August 31, ------------------ ---------------- 1998 1997 1998 1997 ---- ---- ---- ---- Net Income $ 554 $ 470 $1,499 $1,239 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 24 0 12 0 ------ ------ ------ ------ Common and common equivalent shares outstanding-diluted 4,758 4,734 4,746 4,734 ====== ====== ====== ====== Basic earnings per common share $ .12 $ .10 $ .32 $ .26 ====== ====== ====== ====== Diluted earnings per common share $ .12 $ .10 $ .32 $ .26 ====== ====== ====== ====== 11