Fill in the missing data for the following table (in billions):
Consumption: ................._____________
Consumption of durable goods: .......... $1,200
Consumption of nondurable goods: .......... $1,800
Consumption of services: ............. $2,400
Investment: ................ .._____________
Fixed investment: ............... .. $800
Inventory investment: ...................... $600
Government expenditures on goods and services: ... $1,600
Government transfer payments: .......... $500
Exports: .................... $500
Imports: .................... $650
Net exports: .................._____________
GDP: ......................._____________