A firm has determined its cost of each source of capital and optimal capital structure, which is composed of the following sources and target market value proportions: Long term debt has a 40% target weight and costs 10% (before tax); the tax rate is 40%. Common Equity weights 50% and it costs 15% whereas preferred equity is 10% and costs 11%. The weighted average cost of capital is Group of answer choices

10.7 percent

11 percent

15 percent

9 percent

6 percent

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