GDP please help

The follwoing table shows the gross domestic product off a country. Find the GDP in million dollars.

Private consumption expenditure $600 million
Government consumption expenditure $50 million
Net domestic capital formation $300 million
Changes in inventories $-10 million
Domestic exports of goods $500 million
Re-exports of goods $600 million
Imports of goods $800 million
Net exports of services $100 million
Imports of services $400 million
Depreciation $20 million

Choice:
A. 940
B. 970
C. 1340
D. 1370

How to calculate? why?