The Nutrex Corporation wants to calculate its weighted average cost of capital. Its target capital structure weights are 60 percent long-term debt and 40 percent common equity. The before-tax cost of debt is estimated to be 10 percent and the company is in the 40 percent tax bracket. The current risk- free interest rate is 8 percent on Treasury bills. The expected return on the market is 13 percent and the firm's stock beta is 1.8. What is the after-tax weighted average cost of capital? 10.4% 17.0% 16.2% 12.8%