Chu Chu Train Systems is expected to pay a $3.25 annual dividend (D1 = $3.25), the dividend is expected to grow at a constant rate of 5.50% a year, and the common stock currently sells for $75.75 a share. The before-tax cost of debt is 5.50%, and the tax rate is 35%. The target capital structure consists of 40% debt and 60% common equity. What is the company's WACC if all equity is from retained earnings?