RW Industries' has outstanding debt with a market value of $5, 500,000 and the market value of the firm's equity is $6, 250,000. The yield to maturity on RW's outstanding debt is 6.2%, and the required return on the firm's equity is 10.1%. Given a tax rate of 30%, what is RW's weighted average cost of capital? A. 8.31% B. 6.45% C. 5.82% D. 7.40%