bartlett company's target capital structure is 40% debt, 15% preferred, and 45% common equity. the after-tax cost of debt is 5.00%, the cost of preferred is 6.00%, and the cost of common using reinvested earnings is 10.00%. the firm will not be issuing any new stock. you were hired as a consultant to help determine their cost of capital. if bartlett's corporate tax rate is 40%, what is its wacc?