Listed here are the total costs associated with the 2017 production of 1,000 drum sets manufactured by TrueBeat. The drum sets sell for $523 each. Costs 1. Plastic for casing$23,000 2. Wages of assembly workers$86,000 3. Property taxes on factory$6,000 4. Accounting staff salaries$33,000 5. Drum stands (1,000 stands purchased)$39,000 6. Rent cost of equipment for sales staff$48,000 7. Upper management salaries$175,000 8. Annual flat fee for factory maintenance service$17,000 9. Sales commissions$26 per unit 10. Machinery depreciation, straight-line$45,000 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.)