Rebecca carries a balance on her credit card each month. today is the first day of the new, 28-day billing cycle. the current balance is x and the apr is 24%. rebecca is buying a friend an expensive gift that costs $1,400 that she plans to put on her credit card. this will be her only purchase this month, and she will be making this purchase on the last day of the month.how much in finance charges can she save by making the purchase on the last day of the billing cycle versus the first day of the billing cycle? explain how you determined your answer.