The Tyler Oil Company$$s capital structure is as follows:

Debt $30\%$

Preferred stock $15$

Common equity $55$

The aftertax cost of debt is $9$ percent; the cost of preferred stock is $12$ percent; and the cost of common equity $($in the form of retained earnings$)$ is $15$ percent.

Calculate Tyler Oil Company$$s weighted average cost of capital in a manner similar to Table $11-1.($Round the final answers to $2$ decimal places.$)$

Weighted Cost

Debt $($Kd$)\%$

Preferred stock $($Kp$)$

Common equity $($Ke$)($retained earnings$)$

Weighted average cost of capital $($Ka$)$