Nelson-Farrar Quarterly Costimating

Gary FarrarContributing EditorThe costs of two chemicals used in crude-oil refining went unchanged during 2008-10 and are no longer tracked, while the costs of three others varied significantly.The two stable chemicals were hydrofluoric and sulfuric acid.Platinum fell significantly to 900.9 in second-quarter 2009 from 1,593.1 in first-quarter 2008 before rallying back to 1,331.8 in fourth-quarter 2010. The average for 2008 was 1,524.5, however, while 1,183.9 was the average for 2010.Sodium hydroxide rose from 753.7 in first-quarter 2008 and fell during 2009 to 890.7 in the third quarter.Sodium carbonate rose slightly from 549.9 in first-quarter 2008 and ended with 691.7 in fourth-quarter ...

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