4. Recently, Melissa of Melissa's Lawn and Landscaping Service, purchased some equipment for the business. She purchased $8,280 in additional equipment, made a cash down payment of $828, secured a loan for the remaining $7,452, with an interest rate of 3.7%, and a time period of 90 days. (4 points) A) Using ordinary interest, how much will she need to pay back at the end of 90 days? Round to the nearest cent. B) Using exact interest, how much will she need to pay back at the end of 90 days? Round to the nearest cent