The target capital structure for QM Industries is 44 percent common? stock, 14 percent preferred stock, and 42 percent debt. If the cost of common equity for the firm is 18.1 percent, the cost of preferred stock is 9.4 percent, the before-tax cost of debt is 7.6 percent, and the firm's tax rate is 35 ?percent, what is QM's weighted average cost of capital?