Company XYZ produced and sold $1,000 units. The total direct materials cost was $1,000, the direct labor cost was $12,000, the manufacturing overhead cost was $5,000. The variable selling and administrative cost was $10,000 while the fixed selling and administrative expenses was $3,000. How much is the unit product cost in ($)? Select one: O a. 18 O b. 28 Oc. None of the given answers O d. 31 O e. 13.