EXHIBIT 99 906 CERTIFICATION The undersigned certify pursuant to 18 U.S.C.ss.1350, that: (1) The accompanying Quarterly Report on Form 10-Q for the period ended May 31, 2003, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and (2) The information contained in the accompanying Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Date: July 15, 2003 \s\ David H. Roche ----------------------------------- President and Chief Executive Officer EXHIBIT 99 906 CERTIFICATION The undersigned certify pursuant to 18 U.S.C.ss.1350, that: (1) The accompanying Quarterly Report on Form 10-Q for the period ended May 31, 2003, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and (2) The information contained in the accompanying Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Date: July 15, 2003 /s/ Steven M. Caspers ----------------------------------- Executive Vice President and Chief Financial Officer