Exhibit 99.28 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-C KEY PERFORMANCE FACTORS July 31, 2000 Expected B Maturity 6/16/03 Blended Coupon 6.6923% Excess Protection Level 3 Month Average 5.68% July, 2000 6.16% June, 2000 5.06% May, 2000 5.83% Cash Yield19.22% Investor Charge Offs 4.57% Base Rate 8.49% Over 30 Day Delinquency 4.81% Seller's Interest11.87% Total Payment Rate14.13% Total Principal Balance$55,010,319,976.67 Investor Participation Amount$750,000,000.00 Seller Participation Amount$6,529,119,458.18