The target capital structure for QM Industries is $38\%$ common$$ stock, $12\%$ preferred$$ stock, and $50\%$ debt. If the cost of common equity for the firm is $17\mathrm{.}6\%,$ the cost of preferred stock is $9\mathrm{.}7\%,$ the$$ before$-$tax cost of debt is $7\mathrm{.}3\%,$ and the$$ firm's tax rate is $35\%,$ what is$$ QM$\text{'}$s weighted average cost of$$ capital?