Global Technology's capital structure is as follows: The aftertax cost of debt is 8.00 percent; the cost of preferred stock is 12.00 percent; and the cost of common equity (in the form of retained earnings) is 15.00 percent. Calculate the Global Technology's weighted cost of each source of capital and the weighted average cost of capital. Note: Do not round intermediate calculations. Input your answers as a percent rounded to 2 decimal places