$($Related to Checkpoint $14\mathrm{.}1)($Weighted average cost of capital$)$ The target capital structure for QM Industries is $43$ percent

common stock, $7$ percent preferred stock, and $50$ percent debt. If the cost of common equity for the firm is $18\mathrm{.}6$ percent, the cost of

preferred stock is $9\mathrm{.}6$ percent, the before$-$tax cost of debt is $7\mathrm{.}9$ percent, and the firm's tax rate is $35$ percent, what is QM$\text{'}$s weighted

average cost of capital?

QM$\text{'}$s weighted average cost of capital is

$\%.($Round to three decimal places.$)$

Please help this is my third attempt with this question