Answer:
Quigley's WACC = 7.53%
Step-by-step explanation:
The after-tax cost of debt = 0.07 * (1-tax rate)
The after-tax cost of debt = 0.07 * (1 -0.4)
The after-tax cost of debt = 0.07 * 0.6
The after-tax cost of debt = 0.042
The after-tax cost of debt = 4.2%
WACC = Respective costs*Respective weight
40% debt, 10% preferred, and 50% common equity
WACC = (4.2*0.4) + (0.1*6) + (0.5*10.5)
WACC = 1.68 + 0.6 + 5.25
WACC = 7.53%