Oisen Outfitters Inc, believes that its optimal capital structure consist of 50% common equity and 50% debit, and its tax rate is 40%. Oisen must raise additional capital to fund its upcoming expansion. The firm will have $2 million of retained earnings with a cost of r_s = 14%, new common stock in an amount up to $6 million would have a cost of r_s = 17%. Furthermore, Oisen can raise up to $3 million of debit at an interest rate of r_d = 9%, and an additional $3 million of debit at r_d = 12%. The CFO estimate that a proposed expansion would require an investment of $5.7 million. What is the WACC for the last dollar raised to complete the expansion? Round your answer to two decimal palces.