Rible Company has observed that at an activity level of 8,000 units the cost for maintenance is $15,000, and at 10,000 units the cost for maintenance is $16,500. Using the high-low method, the cost formula for maintenance is:
Select one:
a.
$15,000 plus $0.15 per unit.
b.
$9,000 plus $0.75 per unit.
c.
$1.65 per unit.
d.
$1.875 per unit.