A company's cost of equity capital is 12 per cent, and the cost of its debt capital, which consists of 10 per cent loan stock currently traded at par, is 10 per cent. The company receives relief against corporation tax at 30 per cent on interest paid. The market value of the ordinary shares is 30 million and the market value of the loan stock is 20 million. Calculate the company's after-tax Weighted Average Cost of Capital.