Y $200,000,000 YellowNet Company wants to know its weighted average cost of capital using either internal (R.E.) funds or external funds (issuing new stocks). Assume that YellowNet Company is operating at its optimal capital structure: Total capital used by the company $200,000,000 Amount of bonds used $100,000,000 wd - Amount of preferred stock used $20,000,000 wp- Amount of common stock used $80,000,000 The before tax cost of debt 8.2 and the company has a tax rate of 20%. The company's cost of preferred stock is 10.5%. The company's cost of retaining earnings is 11.2% The company's cost of issuing new stocks is 11.5% Calculate the weighted average cost of capital assuming the company uses only internal capital (Retained earnings)