Using the high-low method and the data below, answer the three questions below: Maintenance Month Volume Costs ($) July 4,000 2.500 August 3.000 3.200 September 7,000 4.600 October 9,000 5,500 November 5,000 3,200 December 10,000 6,000 What is the variable cost per unit of volume for the maintenance costs? (Your answer should include a decimal point, two decimal places, and no dollar sign. For example if your answer is 12, type your answer as 12) What is the fixed cost portion of the maintenance costs? (Enter your answer in whole dollars with a comma, do not include a dollar sign or a decimal point. For example if your answer $2234 enter your answer as 2,234) What is the total maintenance cost if volume is 6,200? (Enter your answer in whole dollars with a comma: do not include a dollar sign or a decimal point. For example if your answer $2234 enter your answer as 2,234)