Bumpas Enterprises purchases $4,562,500 in goods per year from its sole supplier on terms of 5/10, net 105 . If the firm chooses to pay on time but does not take the discount, what is the effective annual percentage cost of its non-free trade credit? (Assume a 365-day year.) a. 21.35% b. 21.78% c. 17.68% d. 20.22% e. 19.57%