The management of Old Fenske Company (OFC has been reviewing the company’s financing arrangements. The current financing mix is $750,000 of common stock, $200,000 of preferred stock ($50 par) and $300,000 of debt. OFC currently pays a common stock cash dividend of $2. The common stock sells for $38, and dividends have been growing at about 10% per year. Debt currently provides a yield to maturity to the investor of 12%, and preferred stock pays a dividend of 9% to yield 11%. Any new issue of securities will have a flotation cost of approximately 3%. OFC has retained earnings available for the equity requirement. The company’s effective income tax rate is 40%. Based on this information, the cost of capital for retained earnings is