Wildhorse Corp. has collected the following data concerning its maintenance costs for the past 6 months. Units Produced Total Maintenance Costs July 18,920 $40,151 August 33,632 50,448 September 37,836 57,805 October 23,122 41,356 November 42,040 78,299 December 39,938 65,162 (a1) Your answer is incorrect. Compute 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 unit $