help please

The following six months of data were collected on the number of machine hours operated and utility costs incurred in a factory: Month Machine Hours Utility Costs July 4,975 $26,860 August 5,130 26,400 September 3,100 21,500 October 3,170 20,140 November 3,755 24.780 December 4,320 25,840 Which of the following would be the correct set of high and low months to be used by the high-low method? High: July, Low: October High: August, Low: September High: August, Low: October High: July, Low: September