When Cd, Id & Gd stand for consumption expenditure, investment expenditure & government expenditure respectively, on domestically produced goods & services & X & M stand for aggregate values of export & import for a country, respectively, GDP is calculated as:
1
Cd + ld + Gd + X - M
2
C + I + Gd + X
3
Cd + ld + Gd - M
4
Cd + ld + Gd + X