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.
I think K is the most common. Looks like stainless steel and machines about the same. These two are the only copper/nickel alloys that are called Monel. There are a lot of other copper/nickel alloys. Monel has more nickel than copper. When the copper content gets higher the color changes toward copper. Probably at least 400 alloys of copper with nickel, aluminum, zinc, tin, magnesium with various names but there are only two that are called Monel as far as I know. 04-28-2008, 03:46 PM #20.