計算WACC的問題~~~~急 - 企管

The total book value of the firm's equity is $10 million; book value per
share is $20. The stock sells for a price of $30 per share, and the cost of
equity is 15 %. The firm's bonds have a face value of $5 million and sell
at a price of 110% of face value. The YTM on the bonds is 9%, and the firm's
tax is 40%

WACC = 10/15*15% + 5/15*9%
請問哪裡錯了嗎？
謝謝

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