Question 4 Westerville Corp. has collected the following data concerning its maintenance costs for the past six months: Units Produced Total Cost July August September 17,200 32,800 36,100 22,000 40,900 38,300 $32,109 48,700 55,400 38,000 66,000 62,500 October November December (a1) Calculate the variable cost per unit using the high-low method. (Round variable cost per unit 2 decimal places, e.g. 12.25.) Variable cost $ per unit Attempts: 0 of 3 used SAVE FOR LATER SUBMIT ANSWER (a2) The parts of this question must be completed in order. This part will be available when you complete the part above