This document discusses job-order costing and process costing systems. It defines the two systems, providing examples of companies that would typically use each. Job-order costing is used when many different products are produced to customer orders, requiring unique cost records for each job. Process costing is used when a company produces large quantities of a single product. The document also outlines the key documents used in a job-order costing system, such as job cost sheets, materials requisitions, and time tickets. It explains how predetermined overhead rates are used to apply manufacturing overhead costs and discusses the flow of costs through a job-order system using T-accounts.