Aaron Corporation, which has only one product, has provided the following data concerning its most recent month of operations: Selling price $ 90 Units in beginning inventory 0 Units produced 3,400 Units sold 3,000 Units in ending inventory 400 Variable costs per unit: Direct materials $ 21 Direct labor $ 38 Variable manufacturing overhead $ 6 Variable selling and administrative expense $ 4 Fixed costs: Fixed manufacturing overhead $ 54,400 Fixed selling and administrative expense $ 3,000

What is the net operating income for the month under variable costing?

options: $5,600 $(20,400) $6,400 $12,000