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 25% debt, 10% preferred stock, and 65% common stock. The cost of financing with retained earnings is 13%, the cost of preferred stock financing is 12%, and the before-tax cost of debt financing is 6%. Calculate the weighted average cost of capital (WACC) given a tax rate of 40%

A) The firm's WACC is enter your response here%. (Round to two decimal places.)