Carla Vista, Inc. has collected the following information on its copying costs for the month. Number of Copies Total Copying Costs Week 1 900 $590 Week 2 775 460 Week 3 480 350 Week 4 400 300 Required: (a) Using the high-low-method, compute the variable cost per copy. (Round answer to 2 decimal places, e.g. 52.75.) $