Co XYZ had sales in 2009 of $ 125 million, total assets of S2 million and total bills of $ 40 million.The interest rate of the firm's debt is 6% and its contribution rate is 40 % B'operating proft m Assume that interest must be paid on all debt Determine the following for the following times and interpret the same margin was 10% " A. operating income b'net income" C.operating return on assets d return on equity