APR stands for Annual Percentage Rate and in this problem, we are given APR is equal to 9.7% Per month rate = 9.7% / 12 months = 0.808%
Total credit interest for 12 months = 958.62 *0.097 = $92.97 In one month = $92.97/12 = $7.7475 If you pay at the end of the first month: Payment = 105.00 The amount goes to principal: Amount =$105 - $ 7.7475 Amount = $142.25