Calculator When Job 117 was completed, direct materials totaled $13,328; direct labor, $20,222; and factory overhead, $12,410. A total of 1,915 units were produced at a per-unit cost of Oa. $1,915 Ob $45.960 Oc. $33,550 Od $24 Direct labor and direct materials are Oa. period costs and expensed when incurred Ob. product costs and expensed when incurred Oc: period costs and expensed when the goods are sold Od product costs and expensed when the goods are sold