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Olsen Outfitters Inc, believes that its optimal capital structure consists of 65% common equity and 35% debt, and its tax rate is 25%, Oisen must raise additional capital to fund its upcoming expansion. The firm will have $1 million of retained earnings with a cost of rs=12%. New common stock in an amount up to $8 million would have a cost of re=14.5%. Furthermore, Olsen can raise up to $3 million of debt at an interest rate of rd=11% and an additional $4 million of debt at rd=12%. The CFO estimates that a proposed expansion would require an investment of $5.2 million. What is the WACC for the last dollar raised to complete the expansion? Round your answer to two decimal places