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