Proprietors' Income $ 20 Compensation of Employees 300 Consumption of Fixed Capital 15 Gross Investment 80 Rents 10 Interest 20 Exports 30 Imports 50 Corporate Profits 25 Taxes on Production and Imports 5 Net Foreign Factor Income 0 Statistical Discrepancy 0 Refer to the accompanying data. All figures are in billions of dollars.calculate  Gross domestic product .