Company A's capital is 2,000 million VND, of which: - Bond: 800 million VND with 10% interest rate - Ordinary shares: 1,000 million VND - Shareholders' required rate of return: 9% - Average annual profit growth rate: 5%/year - Preferred stock: 200 million VND with required rate of return: 8% Calculate the average cost of capital of company A given the corporate income tax rate: 28%

Company A's capital is 2,000 million VND, of which: - Bond: 800 million VND with 10% interest rate - Ordinary shares: 1,000 million VND - Shareholders' required rate of return: 9% - Average annual profit growth rate: 5%/ year - Preferred stock: 200 million VND with required rate of return: 8% Calculate the average cost of capital of company A given the corporate income tax rate: 28%