Bumpas Enterprises purchases goods from its sole supplier on terms of 2/10, net 40. The firms ROE is 20% and tax rate is 30%. Assume a 365-day year. If the firm chooses to pay on time but does not take the discount, a. Find the period interest rate. b. Find the annual percentage rate, APR, of the trade credit c. What is the effective annual percentage cost (EAR) of its non-free trade credit? (Assume a 365-day year.) d. If the firm pays instead on day 50 and not day 40, what is the new length of the loan? e. If paying on day 50, find the new effective annual rate (EAR)