Calculate the weighted average cost of capital for Lightning Power Company, given the following information:

Debt: $,8,000$ bonds outstanding with a $6\mathrm{.}5\%$ coupon, par value of $$1,000$ each, with a yield to maturity of $6\mathrm{.}03\%,$ and selling for $106\%$ of par value.

Preferred Stock: $,15,000$ shares outstanding of $4\%$ preferred stock, with a par value of $$100,$ and with a current price per sirtare of $$72.$

Common Stock: $,310,000$ shares outstanding, paying no dividends, selling for $$57$ per share, and with a Beta of $1\mathrm{.}05$

Market Data: $,7\%$ market risk premium on common stock, and a $4\mathrm{.}5\%$ risk$-$free rate

Taxes: The company's tax rate is $35\%$