IF MARION TAKES 90 DAYS SAME AS CASH OPTION AND PAYS WITHIN 90 DAYS..COMPUTE THE AMOUNT OF ORDINARY INTEREST?

SHE OWES? iF SHE CAN NOT PAY TIL APRIL 20 WHAT WOULD HER PAYOFF BE INCLUDING THE ADDITIONAL MONTH OF INTEREST NOTE THAT THE PROBLEM SPECIFIES 2% SIMPLE INTEREST PER MONTH