The target capital structure for QM Industries is $36$ percent common$$ stock, $7$ percent preferred$$ stock, and $57$ percent debt. If the cost of common equity for the firm is $17\mathrm{.}7$percent$,$ the cost of preferred stock is $10\mathrm{.}6$percent$,$ the$$ before$-$tax cost of debt is $7\mathrm{.}8$percent$,$ and the$$ firm's tax rate is $35$percent$,$ what is$$ QM$\text{'}$s weighted average cost of$$ capital?