The target capital structure for Jowers Manufacturing is 51% common stock, 20% preferred stock, and 29% debt. If the cost of common equity for the firm is 20.8%, the cost of preferred stock is 11.8%, and the before tax cost of debt is 10.8%, what is the cost of capital? The firm's tax rate is 34%. Jower's WACC is ?% round to the three decimal places I need simple (if possible) insturctions on how to figure please

Question

The target capital structure for Jowers Manufacturing is 51% common stock, 20% preferred stock, and 29% debt. If the cost of common equity for the firm is 20.8%, the cost of preferred stock is 11.8%, and the before tax cost of debt is 10.8%, what is the cost of capital? The firm's tax rate is 34%. Jower's WACC is ?% round to the three decimal places I need simple (if possible) insturctions on how to figure please 
need help this is a practice question im total lost