Keyser Corporation, which has only one product, has provided the following data concerning its most recent month of operations 6 Selling price S 173 Units in beginning inventory Units produced Units sold Units in ending inventory ,450 9,350 9,450 1,350 Variable costs per unit Direct materials Direct labor Variable manufacturing overhead Variable selling and administrative expense 39 56 20 30 Pixed costsi Pixed manufacturing overhead Fixed selling and administrative expense 74,800 $167,200 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. What is the net operating income for the month under variable costing