Classify each of the following as a variable or fixed cost with respect to a unit of production:

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Part 1

Classifications

Costs

a.

Salaries of production supervisors.

b.

Steel used in automobile production.

c.

Wood used in furniture production.

d.

Salaries for factory custodial staff.

Part 2

e.

Depreciation of factory equipment.

f.

Lubricants for machines.

g.

Electricity used to operate a specific machine.

h.

Wages of production workers (production workers do not vary in the short run).

Part 3

	i.	Rent for a factory building.
	j.	Glue used in furniture production.
	k.	Maintenance for production equipment, performed every month.
	l.	Paper used in newspaper production.