Weir Inc. has a target capital structure of 30% debt, 25% preferred, and 45% common equity. The interest rate on new debt is 6.50%, the yield on the preferred is 6.00%, the cost of retained earnings is 9.6%, and the tax rate is 40%. The WACC for Weir is: 6.81% 6.62% 6.77% 6.99% 6.60%