Sheridan Company accumulates the following data concerning a mixed cost, using units produced as the activity level. Units Produced Total Cost March 10,050 $17,285 April 8,900 15,853 May 10,500 17,547 June 8,730 15,423 July 9,410 16,273 Compute the unit variable costs using the high-low method. (Round answer to 2 decimal places e.g. 2.25.) Variable cost per unit $