Chapter 5 Homework 10 A manufacturer's contribution margin income statement for the year follows. Prepare a contribution margin income statement if the number of units sold (a) increases by 400 units and (b) decreases by 400 units. 1 points Skipped Variable costs Contribution margin Fixed costs Incone Sales ($13 per unit 11,200 units) $145,600 56,000 89,600 78,000 $ 11,600 +00 A Contribution Margin Income Statement For Year Ended December 311 11,600 units sold Pyre References 0 10,800 units sold 0 0 $ 0