Name and explain briefly the TWO ways in which GDP may be calculated. Solution GDP represents the total dollar value of all goods and services produced over a specific time period. In short, it\'s everything produced by people and businesses, including salaries of workers. The two ways in which GDP can be calculated are: Expenditures Approach: This method uses the adding up all the expenditure done by the people and government GDP = C + I + G + (X-M), where consumption (C), investment (I), government spending (G) and net exports (X – M) Income Approach: In this method the income of all the people and government is added NI = W + R + i + PR, where Labor Income (W) Rental Income (R) Interest Income (i) Profits (PR).