Consider financing your firm with $100 debt: The before-tax return is

$280, the investment cost is $200, the tax rate is 30%, the overall cost of capital is 12%, and this debt must offer an expected rate of return of 8.7%. (These are again before-tax opportunity rates of return.) First compute the APV, then compute the capital structure in ratios, and finally show that theWACC yields the same result.