Answer: WACC = Ke (E/V) + kd (D/V)(1-T)
WACC = 13(79/128) + 9(49/128)(1-0.4)
WACC = 8.0234375 + 3.4453125(0.6)
WACC = 10.09%
The weighted average cost of capital of the firm is 10.09%
Explanation: Atlas's weighted average cost of capital is equal to cost of equity multiplied by the ratio of equity to value of the company plus after-tax cost of debt multiplied by the ratio of debt to value of the company.