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 1,000 $ 7,200 October 1,800 $ 10,900 November 5,800 $ 17.200 December 4,600 $ 14,200 Using the high-low method, the estimated variable cost per machine hour for total cost of electricity is approximately: a. $1.94 O b. None of the given answers O c. $2.97 O d. $2.08 Oe. $0.48