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.
Chilean copper-mining company Antofagasta produced 370,000 tonnes of copper in 2016, a decrease from 2015âs total of 370,000 tonnes. In the first half of 2017, the company produced 346,300 tonnes of copper, a 7.1-percent increase over the same period in 2016.
Anaconda Copper Mining Company was started in 1881 when Marcus Daly bought a small silver mine called Anaconda near Butte, Montana. At the time, Daly was working for the Walker Bros. (mining investors) of Salt Lake City, Utah as a mine manager and engineer of the Alice, a silver mine in Walkerville, a suburb of Butte.