Crane Corp. has collected the following data concerning its maintenance costs for the past 6 months Units Total Cost July August September October November December Produced 19,150 34,048 38,304 23,408 42,560 40,432 $44,153 51,072 58,520 47,324 79,268 65,968 (a1 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