Rollins Corporation has a target capital structure consisting of 20% debt, 20% preferred stock, and 60% common equity. Assume the firm has insufficient retained earnings to fund the equity portion of its capital budget. It has 20-year, 12% semiannual coupon bonds that sell at their par value of $1,000. The firm could sell, at par, $100 preferred stock that pays a 12% annual dividend, but flotation costs of 5% would be incurred. Rollins beta is 1.2, the risk-free rate is 10%, and the market risk premium is 5%. Rollins is a constant growth firm that just paid a dividend of $2.00, sells for $27.00 per share, and has a growth rate of 8%. The firms policy is to use a risk premium of 4% when using the bond-yield-plus-risk-premium method to find rs. Flotation costs on new common stock total 10%, and the firms marginal tax rate is 40%. 4. What is the firms cost of retained earnings using the DCF approach? a. 13.6% b. 14.1% c. 16.0%