The Proctor Company must arrange $235,000 financing for its working capital requirements for the coming year. Proctor can (a) borrow from its bank on a simple interest basis (interest payable at the end of the loan) for one year at 7.8 percent simple rate, (b) borrow on a three-month, renewable loan at a 7.6 percent simple interest rate, or (c) borrow on an installment loan basis at 6.0 percent add-on rate with 12 end-of-month payments. What is the rEAR of the least expensive type of credit