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.
The Amalgamated Copper Co. took over Daly s Anaconda Copper Mining Co., as well as Heinze s holdings, and eventually all but some of Clark s holdings until after he died in 1925. After the war, Amalgamated was re-minted into a new Anaconda Copper Mining Company.