The BHP Corporation has debt with a market value of $55 million, preferred stock worth $3 million outstanding, and common equity with a market value of $42 million. The company's debt yields 9.5 percent. Its preferred stock pays $6.5 per share fixed dividend and is currently priced at $50 per share. The company's common stock has a beta of 0.90, the risk-free rate is 4 percent and the market risk premium is 8 percent. Given that BHP Corporation faces 30 percent tax, calculate the company's weighted average cost of capital (WACC)?