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.
Southern Copper Corporation is an American-based copper producer with major operations in Mexico and Peru. Grupo Mexico currently owns 75.1% of the company, which produced 487 thousand metric tons of copper in 2010. Major assets include the Cuajone and Toquepala mines in Peru and the Cananea mine in Mexico.
Please select from the categories below... A&E Metals manufactures a large range of silver and gold wire, sheet and solder in Australia for jewellery industry and industrial applications. We also supply a range of other precious and base metals, including platinum, titanium, brass and copper. Because we manufacture in Australia can we produce a wide range of metals and custom alloys, from sterling silver wire for jewellery making to fine silver rod for electrical contacts.