Kray inc., which produces a single product, has provided the following data for its most recent month of operations: number of units produced 3,300 variable costs per unit: direct materials $ 37 direct labor $ 23 variable manufacturing overhead $ 9 variable selling and administrative expense $ 6 fixed costs: fixed manufacturing overhead $ 237,600 fixed selling and administrative expense $ 234,300 there were no beginning or ending inventories. the variable costing unit product cost was: