Identify each of the following costs as either direct materials, direct labor, or factory overhead. The company manufactures tennis balls.
________ 1. Rubber used to form the cores
________ 2. Factory maintenance
________ 3. Wages paid to assembly workers
________ 4. Glue used in binding rubber cores to felt covers
________ 5. Depreciation—Factory equipment
________ 6. Cans to package the balls