Prepare a contribution margin format income statement; answer what-if questions Shown here is an income statement in the traditional format for a firm with a sales volume of 10,000 units. Cost formulas also are shown: Revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $50,000 Cost of goods sold ($9,000 ? $2.60/unit) . . . . . . . . . . . . . . . . . . . . . . . . . . 35,000 Gross pro? t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $15,000 Operating expenses: Selling ($2,300 ? $.1 5/unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,800 Administration ($4,700 ? $.25/unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,200 Operating income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $4,000 c. Calculate the ?rm