A firm has $5,500,000$ shares of common stock outstanding selling for $$83$ each. The firm also has two bond issues outstanding that make semiannual coupon payments; the first bond issue, that matures in $21$ years, has a face value of $$80,000,000,$ a coupon rate of $5\mathrm{.}5\%,$ and sells for $109\%$ of face value. The second issue, that matures in $6$ years, has a face value of $$45,000,000,$ a coupon rate of $5\mathrm{.}8\%,$ and sells for $108\%$ of face value. Suppose the most recent dividend was $$3\mathrm{.}85,$ the dividend growth rate is $5\%,$ and the tax rate is $21\%.$

What is the firm's weighted average cost of capital? $($Please$,$ do not round your intermediate calculations; round only, if necessary, your final answer, expressed as a percentage, to two decimal places without the $\%$ symbol. Example, if your final answer calculated as $x**Y,$ or $\frac{x}{Y},$ or $x+Y,$ or $x-Y,$ is $0\mathrm{.}124556,$ enter it as $12\mathrm{.}46)$