Oriole, Inc., has collected the following information on its cost of electricity:
Machine Hours Total Electricity Costs January 500 $250 February 540 $300 March 370 $210 April 440 $220 May 680 $290 June 730 $330 July 330 $180 August 530 $260 September 230 $118 October 740 $340 November 860 $370 December 600 $340
