10. Prime costs are the combination of direct labor costs and factory overhead costs. (T/F) 11. Indirect costs can be specifically traced to a cost object. (T/F) 12. If the cost of materials is not a significant portion of the total product cost, the materials may be classified as part of factory overhead cost. (T/F) 13. Prime costs consist of direct materials, indirect materials, and direct labor. (T/F)