[Ch5-1] Ks total utility costs during the past year were $1,200 during its highest month and $800 during its lowest month. These costs corresponded to 22,000 units of production during the high month and 12,000 units during the low month. What is the variable cost per unit using the high-low method?

Select one:

a. $0.067 variable cost per unit.

b. $0.075 variable cost per unit.

c. $25 variable cost per unit.

d. $0.04 variable cost per unit.