2 Distinguish among product costs, period costs, and expenses. 8 Describe the behavior of variable and fixed costs, in total and on a per-unit basis. 9 Distinguish among direct, indirect, controllable, and uncontrollable costs. 2 Diagram and explain the flow of costs through the manufacturing accounts used in product costing. 4 Compute a predetermined overhead rate and explain its use in job-order costing for job-shop and batch-production environments. 5 Prepare journal entries to record the costs of direct material, direct labor, and manufacturing overhead in a job-order costing system.