Section A: Basic Concepts Classify the following costs incurred by a cell phone manufacturing firm as fixed or variable and whether this cost is a period cost or product cost. Fixed or Variable Period or Product 1. Salaries of top executives in the company. 2. Utilities cost for the factory. 3. Depreciation on office building. / 4. Wages paid to assembly-line workers. 5. Salary of cost accountant. 6. Electronic components used in cell phone. 7. Cafeteria costs for the factory. 8. Sales commissions for sales personnel. 9. Depreciation of factory equipment. 10. Wages paid to factory janitors