Differentiate fixed costs and variable costs. 1  Total cost is the sum of fixed and variable costs.  Variable costs change according to the quantity of a good or service being produced. The amount of materials and labor that is needed for to make a good increases in direct proportion to the number of goods produced.
Xtrata is a top five producer of copper, thermal coal, coking coal, ferrochrome, zinc and nickel and has operations in 19 countries. The company's copper production in 2010 was over 900 thousand metric tons and it has copper facilities located in Australia, Chile, Peru, Argentina, and Canada.
Producer Manufacturing Â» Metal Fabrication. Harsco Corp. engages in the provision of industrial services and engineered products. It operates through the following segments: Harsco Metals and Materials, Harsco Industrial, and Harsco Rail. The Harsco Metals and Minerals segment provides on-site services of materials logistics, product quality improvement, and resource recovery for iron, steel, and metals manufacturing.