M\&M and Taxes Southside Systems has $390 million of outstanding debt with a 8% required rate of return. Southside has a required return on assets of 13%, an EBIT of $36 million, and a corporate tax rate of 28%. a. Calculate Southside's present value of the debt tax shields and total firm value. b. Galculate Southside's gain from leverage if there are personal taxes of 20% on stock income and 30% on debt income. a. Southside's present value of the debt tax shields is $ (Round to the nearest dollar.) Southside's total firm value is $. (Round to the nearest dollar.) b. Southside's gain from leverage is $ (Round to the nearest dollar.)