Consider a firm with $32.07 in outstanding debt and $173.04 in equity. If the required return on debt is 5.708%, the required return on equity is 10.870%, and the firm's tax rate is 25%, find the firm's weighted-average cost of capital to four decimal places. Assume no preferred stock is issued. For example, 0.0456 for 4.56%, not 0.04 or 4.56.