To purchase S 13,200 worth of lab equipment for her business, Melissa made a down payment of $ 1900 and took out a business loan for the rest. After 3 years of paying monthly payments of $343.78, she finally paid off the loan. (a) What was the total amount Melissa ended up paying for the equipment X 2 (including the down payment and monthly payments)? s (b) How much interest did Melissa pay on the loan