The controller of Ivanhoe Industries has collected the following monthly expense data for analyzing the cost behavior of electricity costs. Total Electricity Costs Total Machine Hours January $2,410 220 February 2,900 320 March 3,600 500 April 4,650 695 May 3,180 400 June 4,850 770 July 4,040 650 August 3,820 530 September 5,170 665 October 4,300 600 November 3,370 320 December 6,280 790