An economy produces final goods and services with a market value of $7,000 billion in a given year, but only $5,900 billion worth of goods and services are sold to domestic or foreign buyers. The value of GDP is this economy in the given year is $ billion because: O The unsold products are produced outside of the country O The unsold products will be counted in the next year's GDP O The unsold products are added to firms' inventories O $1,100 billion is paid to foreigners