QUESTION 10 Deng Corporation's activity for the first six of the current year is as follows: January February March April May June Machine Hours 12,000 3,000 12,400 1,900 11,800 2,100 Electrical Cost $ 1,560 $ 2,200 $ 1,750 $ 1,520 $ 1,480 $ 1,600 Using the high-low method, the variable cost per machine hour would be: $0.67 O $0.64 O $0.40 O $0.60