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Company X has 100,000 ordinary shares with the current market value of VND 20,000/share. The Company has 100,000 bonds with a par value of VND 10.000/bond, bearing int rate of 10% par and are being sold on the market at par. In prior year the company paid dividend of VND 2,000/share. The Company expects a constant dividend growth rate of 5% every year. Issuance cost rate of new ordinary shares is 10% par. The company has VND 100 million of retained profit for reinvestment. Income tax rate is 25%. if the Comapny has a requirement for capital amounting to VND 150 million then calculate the marginal cost of capital is?