Describe how costs flow through the accounting system in job order costing. [The following information applies to the questions displayed below.] We discuss how costs flow in a job order costing system. The Work in Process Inventory account accumulates the actual direct materials, actual direct labor, and applied manufacturing overhead cost of each job. The Manufacturing Overhead account accumulates all indirect costs that cannot be traced to specific jobs. When a job is completed, its total manufacturing cost is transferred out of Work in Process Inventory and into the Finished Goods Inventory account. Once a job is sold, its cost is transferred out of the Finished Goods Inventory account and into the Cost of Goods Sold account.