Compute the Weighted Average Cost of Capital $($WACC$)$ for Bob$$s Crystal Pool Supply given that the after$-$tax cost of debt financing rd $(1$ T $)$ is $10\%,$ the cost of preferred stock financing $($ rp $)$ is $12\%,$ and the cost of common stock financing $($ rs $)$ is $13\mathrm{.}7\%.$The firm$$s target capital structure is $60\%$ common stock, $30\%$ debt, and $10\%$ preferred stock.