MM Model with Corporate Taxes Walkrun Inc. Is unievered and has a value of $400 billion. An otherwise identical but levered firm finances 25% of its capital structure with debt at a 9% interest rate. No growth is expected. Assume the corporate tax rate is 25%. Use the MM model with corporate taxes to determine the value of the levered firm. Enter your answer in billions. For example, an answer of $1 billion should be entered as 1 , not 1,000,000,000. Round your answer to the nearest whole number. billion