28, J Ross and Sons, Inc has a target capital structure that calls for 40% debt, 10% preferred stock and 50% common equity. The firms current after-tax cost of debt is 6% and it can sell as much debt as it wishes at this rate. The firm's preferred stock currently sells for $90 a share and pays a dividend of $10 per share, however, the firm will only net $80 per share from the sale of the new preferred stock. Ross expects to retain 15,000 in earnings over the next year. Ross' common stock currently sellsfor $40 per share, but the firm will only next $34 per share from the sale of the new common stock The firm recently paid a dividend of $2 per share on its common stock, and investors expect the dividend to grow indefinitely at a constant rate of 10% per year. a. What is the Cost of Capital for Preferred Stock? b. What is the cost of capital for Common Stock