PR 18-2B Classifying costs Obj. 2 - Describe and illustrate the following costs: direct and indirect costs; direct materials, direct labor, and factory overhead costs; and product and period costs. The following is a list of costs incurred by several businesses: a. Salary of quality control supervisor b. Packing supplies for products sold. These supplies are a very small portion of the total cost of the product. c. Factory operating supplies d. Depreciation of factory equipment e. Hourly wages of warehouse laborers f. Wages of company controller's secretary g. Maintenance and repair costs for factory equipment