Calculating WACC for Company XYZ

Company XYZ is analyzing its Weighted Average Cost of Capital (WACC) for investment decision-making. The company has a market value of equity of $500 million and a market value of debt of $200 million. The cost of equity has been estimated at 8%, and the after-tax cost of debt is 4%. Based on this information, which of the following represents the correct calculation of WACC for Company XYZ?