(Weighted average cost of capital) The target capital structure for QM Industries is 42percent common stock, 8 percent preferred stock, and 50percent debt. If the cost of common equity for the firm is 18.1 percent, the cost of preferred stock is 10.3 percent, the before-tax cost of debt is 7.3 percent, and the firm's tax rate is 35percent, what is QM's weighted average cost of capital?