Letson Manufacturing Inc. is a job shop. The management of Letson Manufacturing uses the cost information from the job sheets to assess their cost performance. Information on the total cost, product type, and quantity of items produced is as follows:

a. Develop a graph for each product (three graphs), with Job No. (in date order) on the horizontal axis and unit cost on the vertical axis. Use this information to determine Letson Manufacturing's cost performance over time for the three products.b. What additional information would you require to investigate Letson Manufacturing's cost performance more precisely?

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Job No. Date Quantity Product Amount $ 6,000 Alpha Jan. 2 240 Jan. 15 22 1,100 Beta 8,800 38 Feb. 3 800 Beta 8,000 Mar. 7 56 400 Alpha 8,800 Mar. 24 65 1,500 1,750 Gamma 6,000 May 19 June 12 74 Gamma 10,500 6,300 87 350 Alpha Aug. 18 Sept. 2 92 2,200 600 Gamma 19,800 4,800 100 Beta Nov. 14 110 500 Alpha 7,000 Dec. 12 116 2,000 Gamma 24,000