Based on the following information, what is the firms weighted average cost of capital of the operating assets, WACCO? Cost of debt, RD: 7% Cost of equity, RS: 20% Total market value of debt, D: 500 Total market value of equity, S: 1,500 Number of common shares outstanding: 100 Total market value of non-operating assets, N: 200 Cost of non-operating assets, RN: 9% Corporate tax rate, T: 40%