Diego Company manufactures one product that is sold for $78 per unit. The following information pertains to the companys first year of operations in which it produced 60,000 units and sold 55,000 units. Variable costs per unit: Manufacturing: Direct materials $ 28 Direct labour $ 12 Variable manufacturing overhead $ 2 Variable selling and administrative $ 3 Fixed costs per year: Fixed manufacturing overhead $ 1,260,000 Fixed selling and administrative expenses $ 654,000 Required: 1. What is the unit product cost under variable costing?