Size of Tax Shield. Roxy Broadcasting was originally an all-equity firm with a before-tax value of $30,000,000. Determine the size of the tax shield with a corporate tax rate of 10%, 26%, 36%, and 45% if Roxy's capital structure is 25/75 debt to equity. Determine the same if the capital structure is 75/25. if Roxy's capital structure is 25/75 debt to equity, what is the size of the tax shield with a corporate tax rate of 10%? (Round to the nearest dollar)