A pay-day loan is a short-term loan provided to people who make a promise to repay the debt when they receive their next paycheck. Suppose some unexpected bills leave you short of cash and you will not receive another paycheck until next month. A local establishment offers a pay-day loan where you can borrow the $400 you need to cover expensies. The states annual interest rate is 18% and the amount borrowed, plus interest, is due in one month. The loan also requires that you pay a $25 fee at the time at which you receive the funds. If you repay the debt as promised, what is the effective cost of this loan?