Month January February March April May June (a1) Total Maintenance Costs $2,630 2,930 3,530 4,430 3,130 5,230 Total Machine Hours 350 Variable cost per machine hour $ 400 550 640 550 750 Determine the unit variable costs using the high-low method for this mixed cost. (Round answer to 2 decimal places e.g. 2.25.)

Determine the unit variable costs using the high-low method for this mixed cost. (Round answer to 2 decimal places e.g. 2.25.) Variable cost per machine hour