shelbymustang913 shelbymustang913 04-01-2018 Mathematics contestada your parents have a credit card with a balance of 2,748.56. the interest rate is 10.5% APR. a late payment fee of 40.00 is added to the principal if they pay after 6/1. they make a payment for 300.00 on 6/1. how much interest did they pay?