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.
Copperhead Agricultural Products, LLC was founded by Dave Terveen and Kevin Berg after the two discovered they had a unique combination of ideas and know-how. Dave is a full-time farmer and business owner in South Dakota; Kevin grew up on a farm and is a mechanical engineer and machine shop owner. Coffee-shop discussions of new ways to approach common challenges led to the creation of the Furrow CruiserÂ® spiked closing wheel.