A City Guide To Tsqaltubo for Dumping is a form of price discrimination. durable goods: products designed for use in excess of one year. economic efficiency: when goods and services are allocated in such a way as to maximize net benefit (that is, allow the most benefit to all to be achieved for the least cost). economic cost: the sum of a firm’s actual (monetary) expenditures and the opportunity cost associated with using the resources and factors making up those expenditures. economic profit: the difference between a firm’s total revenue and total economic cost. Because economic profit includes opportunity cost, economic profit provides a natural comparison between an owner’s investment in a firm and the return on the next-best alternative investment. economic system: a means of organizing demanders, suppliers, and the government in order to answer questions about what goods and services to produce, how to produce those goods and services, and then how to distribute the goods and services produced. A City Guide To Tsqaltubo 2016.