The Scattergraph and High Low Methods Ginobli Company manufactures complex machines that are used by companies in the aerospace industry for various types of spacecraft (e.g., satellites, lunar probes, etc.). Ginobli had the following 10 months of data on materials handling cost and number of parts within its manufacturing plant: Month Materials Handling Cost Number of Parts $31,550 450 January February 44,500 700 March 48,875 550 April 36,000 36,375 525 May 50,625 650 June July 49,125 675 56,500 800 August 850 September 56,750 775 October 52,125