Kray Inc., which produces a single product, has provided the following data for its most recent month of operations: Number of units produced 3,000 Variable costs per unit: Direct materials $91 Direct labor $13 Variable manufacturing overhead $7 Variable selling and administrative expense $6 Fixed costs: Fixed manufacturing overhead $237,000 Fixed selling and administrative expense $165,000 There were no beginning or ending inventories. The unit product cost under variable costing was:

a) $111

b) $190

c) $117

d) $110