Pharoah Corp. has collected the following data concerning its maintenance costs for the past 6 months. Total Cost July August September October November December Units Produced 20,160 35,840 40,320 24,640 44.800 42,560 $40,320 53.760 61,600 42,560 83,440 69.440 (al) Compute the variable cost per unit using the high-low method. (Round answer to 2 decimal places, eg. 2.25) Variable cost perunit