The study of individual markets of demand and supply in which the 'players', or the decision makers, were also individuals (buyers or sellers, even companies) who were seen as trying to maximize their profits (as producers or sellers) and their personal satisfaction or welfare levels (as consumers) is called?
If for the year a country's GDP was $990 million, consumer spending was $630 million, investment by businesses was $110 million, exports were $55 million and imports were $45 million, calculate government spending?