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.
Our Business. Founded in 1948, Gulf Copper & Manufacturing Corporation, an employee-owned company, repairs and refurbishes marine vessels and offshore rigs and fabricates ancillary components. The company operates strategically located shipyards, drydocks and fabrication facilities along the U.S. Gulf Coast. Gulf Copper serves the oil and gas, marine transportation, refining, petrochemical markets in addition to the United States government.