classify cost as fixed, mixed, or variable. Cost of labor for hourly workers, factory cleaning costs $6,000 per momnth, hourly wages of machine operators, computer chip (purchase from vendor), Electricity costs $.20 per kilowatt hour, metal, salary of plant manager, property taxes $165000 per year on factory building and equipment, plastic, Oil use in manufacturing equipment, Rent on warehouse $10,000 per month plus per square foot of shortage used