Wildhorse Company accumulates the following data concerning a mixed cost, using miles as the activity level. Miles Driven Total Miles Total Cost Driven Cost January 8,000 $14,120 March 8,550 $14,979 February 7,490 13,495 April 8,195 14,490 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 mile $