Maintenance costs at Seaside Manufacturing over the past six months are listed in the following table Month January February March April May June Maintenance cost $13,600 $14,720 $12,460 $14,480 $15,080 $13,200 Machine hours 15,500 16,900 13,800 16,600 17,100 15,000 Using the high -low method, what would the variable maintenance cost per machine hour be? O A. $0.88 B. $0.90 O C. $0.79 O D. $1.26