The capital structure for HCA is provided below. If the firm has a 4% after tax cost of debt, 7% commercial loan rate, a 12.5% cost of preferred stock, and an 17% cost of common stock, what is the firm's weighted average cost of capital (WACC)? [a]

Note: format is xx.xx%

Capital Structure (in K's)
Bonds		$ 1,083
Commercial Loans		$ 2,845
Preferred Stock		$ 268
Common Stock		$ 3,681