Conversion costs are the sum of Indirect materials costs and indirect labor costs Direct materials costs and overhead costs O Direct labor costs and overhead costs Direct materials costs and direct labor costs In a process costing system, manufacturing overhead is assigned to work in process by Job based on predetermined overhead rates O Department based on actual overhead costs incurred Job based on actual overhead costs incurred O Department based on predetermined overhead rates The journal entry that assigns raw materials costs in a process costing system includes O Credit to raw materials O Credit to Work in Process O Debit to raw materials O Debit to Accounts Payable In traditional costing systems usually cost driver is O number of product O number of set ups of machine direct labor hour O number of employees In traditional costing systems usually cost driver is O number of product O number of set ups of machine O direct labor hour O number of employees