Khanam Corporation, which has only one product, has provided the following data concerning its most recent month of operations: Selling price $113 Units in beginning inventory 700 Units produced 8,600 Units sold 8,700 Units in ending inventory 600 Variable costs per unit: Direct materials $24 Direct labor $41 Variable manufacturing overhead $5 Variable selling and administrative $15 Fixed costs: Fixed manufacturing overhead $68,800 Fixed selling and administrative $162,700 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? $11,300 $12,100 $3,600 $19,100