Indicate whether each of the following costs of an automobile manufacturer would be classified as direct materials, direct labor, or manufacturing overhead. (a) Windshield. (b) Engine. (c) Wages of assembly-line worker. (d) Depreciation of factory machinery. (e) Factory machinery lubricants. (f) Tires. (g) Steering wheel. (h) Salary of painting supervisor. (a) Windshield. (b) Engine. (c) Wages of assembly-line (d) Depreciation of factory (e) Factory machinery lub (f) Tires. (g) Steering wheel. (h) Salary of painting sup