Capital gain of listed share

Abinash Panda (80 Points)

16 January 2023  
Namaste,
I bought 1000 shares of a listed company in 1980 @ 1000 each. and sold it in 22-23 . fmv on April 1 -2001 April is 1500 .
my doubt is what is the actual cost of acquisition ?
Thank you