Fulton and Sons, Inc. presently leases a copy machine under an agreement that calls for a fixed fee each month and a charge for each copy made. Fulton made 6,000 copies and paid a total of $570 in March; in May, the firm paid $440 for 4,000 copies. The company uses the high-low method to analyze costs. Fultons variable cost per copy is: (Round your final answer to 3 decimal places.)