1. The following is a list of various costs of producing sweatshirts. Classify each cost as either a variable, fixed, or mixed cost for units produced and sold.

	Electricity costs of $0.025 per kilowatt-hour
	Warehouse rent of $6,000 per month plus $0.50 per square foot of storage used
	Thread
	Zip used in sweatshirts
	Janitorial costs of $2,000 per month
	Advertising costs of $10,000 per month
	Plant manager salary
	Color dyes for producing different colors of sweatshirts
	Salary of the production supervisor
	Straight-line depreciation on sewing machines
	Patterns for different designs. Patterns typically last many years before being replaced
	Maintenance costs for the company's sewing machine. The cost is $2,000 per year plus $0.001 for each machine hour of use
	Property taxes on factory, building, and equipment
	Cotton and polyester cloth
	Hourly wages of sewing machine operators