?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 4040?% ?debt, 2020?% preferred? stock, and 40 %40% common stock. The cost of financing with retained earnings is 1515?%, the cost of preferred stock financing is 1212?%, and the? before-tax cost of debt financing is 77?%. Calculate the weighted average cost of capital ?(WACC?) given a tax rate of 25 %.