7. If a frozen pizza plant is the cost object, classify each of the following costs as direct or indirect, respectively: property insurance, cafeteria workers wages, and janitorial supplies. a. direct, indirect, and indirect b. direct, indirect, and direct c. all are direct d. all are indirect 8. Product costs a. are inventoriable costs. b. are manufacturing costs. c. include direct materials, direct labor, and overhead. d. are all of these.