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theyre all one question just 3 parts

Use the following to answer questions 8-10: Johnson Company has provided the following data for the first five months of the year: Machine Hours Lubrication Cost January..... 120 $750 February 160 $800 March.. 200 $870 April.......... 150 $790 May.. 170 $840 8. Using the high-low method of analysis, the estimated variable lubrication cost per machine hour is closest to: A) $1.40 B) $1.25 C) $0.67 D) $1.50 9. Using the high-low method of analysis, the estimated monthly fixed component of lubrication cost is closest to: A) $570 B) $560 C) $585 $565 D) A) 10. Total lubrication cost for an activity level of 180 machine hours would be: $840 $270 C) $570 D) $565 B)