Carla Vista Corp. has collected the following data concerning its maintenance costs for the past 6 months Units Produced Total Cost July 21.240 $42,480 37.760 56,640 August September October 42,480 64.900 25,960 44,840 47,200 87.910 November December 44,840 73,160 (1) Compute the variable cost per unit using the high-low method. (Round answer to 2 decimal places, e.g. 2.25.) Variable cost per unit $