The Nolan Corporation finds it is necessary to determine its marginal cost of capital. Nolans current capital structure calls for 35 percent debt, 20 percent preferred stock, and 45 percent common equity. Initially, common equity will be in the form of retained earnings (K_e) and then new common stock (K_n). The costs of the various sources of financing are as follows: debt (after-tax), 9.5 percent; preferred stock, 7 percent; retained earnings, 15 percent; and new common stock, 12.2 percent.

a. What is the initial weighted average cost of capital? (Include debt, preferred stock, and common equity in the form of retained earnings, K_e.) (Do not round intermediate calculations. Input your answers as a percent rounded to 2 decimal places.)