Paul Beverages sells a variety of protein shakes and fruit juices to small health food stores. Paul purchases the shakes and juices from leading manufacturers. Identify each of the following costs incurred by Paul Beverages in terms of its cost behaviorvariable, fixed, mixed, or step.

a.	Human resource director salary	select an option
b.	8-ounce protein shake	select an option

c.	Monthly delivery truck lease payment of $350	select an option

d.	Straight line depreciation on office equipment	select an option

e.	Shipping (billed in 100-case increments)	select an option

f.	Sales commission (4% of sales revenue)	select an option

g.	Copy machine rental (monthly fee of $35 plus $0.01 per copy)