Nathan Inc. provides the following cost information for producing 12,000 units of inventory during the current month: Direct materials $56,000 Direct labor 78,000 Variable manufacturing overhead 28,000 Fixed manufacturing overhead 30,000 Variable Selling and Administrative Costs 28,000 Fixed Selling and Administrative Costs 15,000 The product costs per unit under variable costing would be: Group of answer choices $16 per unit $15.50 per unit $13.50 per unit $19.58 per unit