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.
Tata Steel Europe Ltd. (formerly Corus Group plc) is a multinational steelmaking company headquartered in London, United Kingdom, it has been a wholly owned subsidiary of Tata Steel since 2007.ata surprised the credit default swap segment of the derivative markets by deciding to raise $6.17 billion of debt for the deal through a new subsidiary of Corus called 'Tata Steel UK', rather than by raising the debt itself. Tata's security credit rating is investment grade, whereas the new subsidiary may not be.