A firm issues a common stock that is currently selling for $15.25 per share. Its non-callable $1,000 par value, 20-year bond with 7.25% coupon rate pay semiannual coupon payments is selling for $875.00. The common stock beta is 1.25, the risk free rate is 3.50%. The required total return on the stock market index (S&P500 index) is 11.50%. The firm also has a preferred stock with preferred constant divided of $2 and its preferred stock is selling at $25 per share. The firm's corporate tax rate is 25%. If this firm issues 10 shares of bond, 100 shares of preferred stock and 10,000 shares of common stock, what is this firm weighted average cost of capital (WACC)?