Ricco was reviewing the water bill for his carwash business and determined that the highest bill, $6,000, occurred in July when 2,000 cars were washed. The lowest bill, $4,500, occurred in February when 1,000 cars were washed. Use the high-low method to answer the following questions.

What was the variable cost per carwash?

Question 10 options:

$0.67

$3.00

$1.50

$4.50