Problem: The D. J. Masson Corporation needs to raise $500,000 for 1 year to supply working capital to a new store. Masson buys from its suppliers on terms of 3/10, net 90, and it currently pays on the 10th day and takes discounts, but it could forgo discounts, pay on the 90th day, and get the needed $500,000 in the form of costly trade credit. What is the effective annual interest rate of the costly trade credit?