​Crawley, Inc. has a line of credit with HNC Bank that allows the company to borrow up to​ $800,000 at an interest rate of 12 percent.​ However, Crawley, Inc. must keep a compensating balance of 18 percent of any amount borrowed on deposit at the bank.​ Crawley, Inc. does not normally keep a cash balance account with HNC Bank. What is the effective annual cost of​ credit?