The following information is available for Mazoon company's electricity cost for operating its heavy machinery over the last quarter of the year 2020. Month Machine hours Electricity cost September 1,800 $ 10,90 0 October 800 $ 6,200 November 5,800 $ 17,20 0 December 4,600 14,20 $ 0 Using the high-low method, the estimated variable cost per machine hour for total cost of electricity is approximately: a. $0.45 b. $2.2 O C. $2.11 d. None of the given answers O e. $2.97 O