Alvarez Manufacturing Inc. is a job shop. The management of Alvarez Manufacturing Inc. uses the cost information from the job sheets to assess 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 Number (in date order) on the horizontal axis and Unit Cost on the vertical axis. Use this information to determine Alvarez Manufacturing Inc.’s cost performance over time for the three products.

b. What additional information would you require in order to investigate Alvarez Manufacturing Inc.’s cost performance more precisely?

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Date Job No. Quantity Amount Product Jan. 2 TT 520 $16,120 Jarn. 15 22 1,610 20,125 Feb. 3 30 1,420 25,560 Mar. 7 670 15,075 41 TT Mar. 24 49 SLK 2,210 22,100 31,875 2,550 May 19 58 SLK 620 June 12 65 TT 10,540 Aug. 18 Sept. 2 78 SLK 3,110 1,210 48,205 16,940 82 TT 8,250 52,650 Nov. 14 92 750 Sma 98 Dec. 12 SLK 2,700