Exercise 5-3 a1-a2 (Video) (Part Level Submission) The controller of Crane Industries has collected the following monthly expense data for use in analyzing the cost behavior of maintenance costs. Month Total Maintenance Costs $2,880 3,180 3,780 Total Machine Hours 330 380 530 January February March April May June 4,680 3,380 5,520 660 530 730 (al) Determine the variable cost components using the high-low method. (Round answer to 2 decimal places e.g. 2.25.) Variable cost per machine hour