Your company has a target capital structure of 51 percent common stock, 13 percent preferred stock, and the remaining percent debt. Its cost of equity is 12.8 percent, the cost of preferred stock is 9.6 percent, and the pretax cost of debt is 5.5 percent. The relevant tax rate is 18 percent. What is the company's WACC? (Do not round any intermediate calculations. List your answer as a percent, round your final answer to 2 decimal places and enter it in the box below.)