Selected costs related to Apple's iPhone are listed below, Classify cach cost as either direct materials, direct labor, factory everhead, selling expenses, or general and administrative expenses 1. Display screen 2. Assemblytine supervisor salary 3. Wages for assembly workers 4. Salary of chief executive officer 5. Glue to hold iPhone cases together 6. Uniforms provied for each factory worker 7. Wages for retail store salesperion 8. Depreciation (straigtitline) on robotic equipment used in assembly