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Size of Tax Shield. Roxy Broadcasting was originally an all-equity firm with a before-tax value of $15,000,000. Determine the size of the tax shield with a corporate tax rate of 18%, 20%, 32%, and 40% if Roxy's capital structure is 40 / 60 debt to equity. Determine the same if the capital structure is 60/40. If Roxy's capital structure is 40/60 debt to equity, what is the size of the tax shield with a corporate tax rate of 18%? $ (Round to the nearest dollar.)