Complete the following table and answer the next question(s) on the basis of the resulting data. All figures are in billions of dollars

Domestic Closed Exports Imports Aggregate Aggregate Output economic expenditures expenditures, (GDP) C+1 Net exports open economy $200 $230 $30 $20 S S 250 270 30 20 - - - - - 300 310 30 20 - - - -- 350 350 30 20 400 390 30 20 450 430 30 20 500 470 30 20