Brannan Manufacturing has a target debt$-$equity ratio of $\mathrm{.}85.$ Its cost of equity is $13$ percent, and its cost of debt is $7$ percent. If the tax rate is $21$ percent, what is the company's WACC? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$