10. For a hardware manufacturer, prepare graphs and analyze the internal failure costs for the past six months using the net sales index. Net Sales Month Cost (Thousands) Mar. $45,300 $ 755 April $45,800 $ 790 May $46, 100 $ 840 June $47,000 $ 925 July $48,600 $1,050 Aug. $49,300 $1,232 11. For a microwave manufacturer, prepare and analyze the graph of the procurement appraisal costs as a percent of total purchased material costs using the following data: Procurement Appraisal Purchased Material Month Costs (Thousands) Costs (Thousands) June 8.5 102 July 7.9 127 Aug. 9.9 1 16 Sept. 7.2 1 15 Oct. 7.7 108 Nov. 6.2 112 12. Prepare a short-range trend chart of the operations appraisal cost/production cost ratio using the fol- lowing data. Operation Appraisal Production Costs Month Costs (Thousands) (Thousands) Jan. $10 $100 Feb. $13 $120 Mar $ 9 $115 April $11 $145 May $ 9 $125 June $ 8 $ 95 July $ 8 $105 What information does the chart give? Suggest additional information that could be valuable