Fairmont Company, based in Kansas, has $3 million in excess cash that it has invested in Brazil at an annual interest rate of 25 percent. The U.S. interest rate is 6 percent. By how much would the Brazilian real (the currency of Brazil) have to depreciate to cause such a strategy to backfire? (In other word, at what rate of depreciation of the Brazilian real would the effective rate be lower in Brazil than in the United States?)