Common equity 40% The aftertax cost of debt is 8%, and the cost of common equity (in the form of retained earnings) is 15 percent. What is the firm's weighted average cost of capital)? ( Please use format provided) Q7. Hitech Company's capital structure is as follows: Debt 25% Preferred stock 20 Common equity 55% The aftertax cost of debt is 7%; the cost of preferred stock is 12 percent; and the cost of common equity (in the form of retained earnings) is 14 percent. Calculate Hitech Company's weighted average cost of capital in a manner similar to Q6