Using the following income statements, prepare a contribution margin income statement for March. (Round per unit answers to 2 decimal places, e.g. 52.75.) Sales revenue Cost of goods sold Gross profit Rent expense Wages expense Shipping expense Utilities expense Advertising expense Insurance expense Operating income February $25,000 10,000 15.000 1.500 3,500 1,100 750 March $37,500 15,000 22.500 1,500 5,000 1,650 750 1,400 585 $11,615 1.000 585 $6.565 Total Per unit a $ $ >