Marginal Incorporated (MI) has determined that its before-tax cost of debt is 5.0% for the first $198 million in bonds it issues, and 8.0% for any bonds issued above $198 million. Its cost of preferred stock is 11.0%. Its cost of internal equity is 16.0%, and its cost of external equity is 20.0%. Currently, the firm's capital structure has $310 million of debt, $30 million of preferred stock, and $160 million of common equity. The firm's marginal tax rate is 35%. The firm's managers have determined that the firm should have $73 million available from retained earnings for investment purposes next period. What is the firm's marginal cost of capital at a total investment level of $415 million? 9.08% 10.28% 7.80% 9.00% 12.02% 10.16% 8.88% 10.74% Marginal Incorporated (MI) has determined that its after-tax cost of debt is 6.0% for the first $134 million in bonds it issues, and 10.0% for any bonds issued above $134 million. Its cost of preferred stock is 15.0%. Its cost of internal equity is 18.0%, and its cost of external equity is 21.0%. Currently, the firm's capital structure has $276 million of debt, $30 million of preferred stock, and $294 million of common equity. The firm's marginal tax rate is 35%. The firm's managers have determined that the firm should have $89 million available from retained earnings for investment purposes next period. What is the firm's marginal cost of capital at a total investment level of $127 million? 12.83% 15.64% 13.80% 14.17% 14.03% 12.33% 11.36% 12.56%