Need help immediately please 

Solution:

​​Using Value Added Method:
Gross Value Added at Market Price (GVA at MP) = Value of Output (Sales + Change in stock) - Intermediate Cost.
GVA at MP = 800−200
                    = 600 crores.
NVA at FC = GVA at MP - Depreciation - Net Indirect Tax (Indirect tax - Subsidies)
                   = 600−20−(30−50) 
                   = 600 crores.