6. Problem 10.40 (WACC and Percentage of Debt Financing) look Olen Outfitters Inc. believes that its optimal capital structure consists of 70% common equity and 30% debt, and its tax rate is 10%. Olen must raise additional capital to fund its upcoming expansion. The firm will have $5 million of retained earnings with a cost of t. -10%. New common stock in an amount up to 16 million would have a cost of r. - 12.0% Furthermore, Ole can be up to 14 million of debt at an interest rate of 99 and an additional 3 million of debt at -15%. The CFO estimates that a proposed expansion would require an investment of $11.6 million. What is the WACC for the last dollar rased to complete the expansion Hound your answer to two decimal places