b) Wilson an automotive technician has been operating a garage in Mombasa for the past two years. A year ago he converted part of his garage to a welding shop making and selling metal doors and windows. He had anticipated that he..cost of welding shop would primarily be final but has realized that the welding cost increased with the increase in number of welding job assignment. The costs of welding job assignments are as follows. Perched Sept 2008 Oct 2008 Nov 2008. Dec 2008. Jan 2009 Feb 2009 Mar 2009 Apr 2009 i) No of welding job assignments 280 800 1,240 1,000 600 920 860 1,200 11) Total cost sh '000' 700 High-low method Simple linear regression method. 860 110 REQUIRED: Formulate an equation to estimate the total cost of the welding shop and compute the cost of undertakings 1256 assignment using 960 720 910 880 260 (6 Marks)​