Nelter Corporation, which has only one product, has provided the following data concerning its most recent month of operations: Selling price $ 120 Units in beginning inventory 320 Units produced 6,540 Units sold 6,260 Units in ending inventory 600 Variable costs per unit: Direct materials $ 41 Direct labor $ 23 Variable manufacturing overhead $ 2 Variable selling and administrative expense $ 12 Fixed costs: Fixed manufacturing overhead $ 156,960 Fixed selling and administrative expense $ 93,900 The company produces the same number of units every month, although the sales in units vary from month to month. The company's variable costs per unit and total fixed costs have been constant from month to month. Required: a. Prepare a contribution format income statement for the month using variable costing. b. Prepare an income statement for the month using absorption costing.