The WACC K. Bell Jewelers wishes to explore the effect on its cost of capital of the rate at which the company pays taxes: The firm wishes to maintain a capital structure of 40% debt, 15% preferred stock, and 45% common stock. The cost of financing with retained eamings is 17%, the cost of preferred stock financing is 11%, and the before-tax cost of debt financing is 11%. Calculate the weighted average cost of capital (WACC) given a tax rate of 21%. The firm's WACC is Y. (Round to two decimal places.)