The following data summarize the expenditures for the country of XYZ during 2003 in millions of alphabet, the currency of country XYZ.
| 
 Gross Private Domestic Investment 
 | 
 $300 
 | 
| 
 Business Fixed Investment 
 | 
 $200 
 | 
| 
 Change in Inventories 
 | 
 $100 
 | 
| 
 Exports 
 | 
 $200 
 | 
| 
 Imports 
 | 
 $200 
 | 
| 
 Personal Consumption Expenditures 
 | 
 $800 
 | 
| 
 Government Consumption Expenditures and Gross Investment 
 | 
 $500 
 | 
| 
 Statistical Discrepancy 
 | 
 $10 
 | 
| 
 Depreciation Expenditures 
 | 
 $50 
 | 
a. Calculate net exports
b. Calculate GDP
c. Calculate national income
d. Assume that the GDP deflator is 120 and calculate real GDP for 2003.