Kingbird Motors is a division of Kingbird Products Corporation. The division manufactures and sells an electric switch used in a wide variety of applications. During the coming year, it expects to sell 220,000 units for $8.00 per unit. Helen Martin is the division manager. She is considering producing either 220.000 or 250.000 units during the period. Other information is as follows: Prepare a variable-costing income statement, with one column showing the results if 220,000 units are produced and one columr