For first investment in HUL:
Initial amount = 3600000
Buy price Monday = 1933
Number of shares = ⌊19333600000⌋=1862 shares
Sell price Wednesday = 1979
Proceeds = 1862×1979=3684898
For second investment in Britannia:
Amount available = 3684898
Buy price Wednesday = 3115
Number of shares = ⌊31153684898⌋=1183 shares
Sell price Friday = 3140
Final value = 1183×3140=3714620
For total return calculation:
Initial investment = 3600000
Final value = 3714620
Return = 36000003714620−3600000×100
=3600000114620×100
=3.184%=approximately 3.2%