Listed here are the total costs associated with the 2017 production of 1,000 drum sets manufactured by TrueBeat. The drum sets sell for $528 each. Costs 1. Plastic for casing—$21,000 2. Wages of assembly workers—$81,000 3. Property taxes on factory—$8,000 4. Accounting staff salaries—$37,000 5. Drum stands (1,000 stands purchased)—$38,000 6. Rent cost of equipment for sales staff—$24,000 7. Upper management salaries—$215,000 8. Annual flat fee for factory maintenance service—$16,000 9. Sales commissions—$13 per unit 10. Machinery depreciation, straight-line—$40,000 Required: 1. Classify each cost and its amount as (a) either variable or fixed and (b) either product or period. (The first cost is completed as an example.)