Current Attempt in Progress Carla Vista Company accumulates the following data concerning a mixed cost, using miles as the activity level. (a1) Compute the variable cost per mile using the high-low method. (Round answer to 2 decimal places, e.g. 2.25.) Variable cost per mile $ eTextbook and Media Save for Later Attempts: 0 of 3 used (a2) The parts of this question must be completed in order. This part will be available when you complete the part above