Question 3: Cost terminology in manufacturing firms a) Direct materials include all materials and components only raw materials such as steel and glass only major materials and components Correct: Your answer is correct. Direct labor includes all production labor including supervisors and maintenance staff only managers who directly supervise the production process only hourly production workers (aka assembly workers) Correct: Your answer is correct. Manufacturing overhead includes only big items that cannot be traced (e. g., factory rent) only non-manufacturing costs only small items that are not worth tracing (e. g., glue, grease) both big items that cannot be traced (e. g., factory rent) and small items that are not worth tracing (e. g., glue, grease) Correct: Your answer is correct. b) Classify the following items as direct materials (DM), direct labor (DL), or manufacturing overhead (OH) for a car assembly plant: Rent for the factory building DL DM OH Correct: Your answer is correct. Cost of engines used in production DL DM OH Correct: Your answer is correct. Depreciation on production equipment DL DM OH Correct: Your answer is correct. Cost of lubricant used in production DL DM OH Correct: Your answer is correct. Production supervisor's salary DL DM OH Correct: Your answer is correct. Assembly workers' wages DL DM OH Correct: Your answer is correct.