Aggregate Demand: Aggregate
demand is the sum of all demand in an economy. This can be computed by adding the expenditure on consumer goods and services,government
purchase, investment, and net exports (total exports minus total imports).
Aggregate Supply: Aggregate
supply is the total value of the goods and services produced in a country, plus the value of imported goods less the value
Average Total Cost: Average
total cost is the sum of all the production costs divided by the number of units produced.