Blue Co. is funded only by debt and equity with a weighted average cost of capital at 20%. The debt ratio of the company is 20%. Using the discounted cash flow model, the cost of equity is determined...

Blue Co. is funded only by debt and equity with a weighted average cost of capital at 20%. The debt ratio of the company is 20%. Using the discounted cash flow model, the cost of equity is determined at 10%. The applicable after-tax rate of the company is 80%. Determine the cost of debt before the application of the tax shield. (In percentage, put percentage sign)