The expenditure method calculates GDP by summing expenditures in the economy across four components: personal consumption, gross private domestic investment, government consumption and gross investment, and net exports. Personal consumption includes household spending on goods and services. Gross private domestic investment includes business spending on machinery, equipment, and housing construction. Government consumption and gross investment includes government spending on goods, services, and infrastructure projects. Net exports is exports minus imports, representing the value of domestically produced goods and services sold abroad less the value of foreign-produced goods and services purchased domestically.