Tax on transfer of right in under construction property/before possession

Sir,

i booked a builder flat in NOIDA on 28-2-2010 and allotment letter issued on 18-3-2010. Total cost of the flat was Rs.2932000/-. i deposited Rs.1737560/- in the F.Y. 2010-11, Rs.843529/- in 2011-12, and Rs.272053/-in 2012-13. I transferred  the flat before taking possession in Nov.2018 for Rs.4850000/- through the builder and deposited Rs.170000/- as transfer charges in builder's office and Rs.50000/- commission to agent..  I request to please let me know how much will be the total LTCG and benefit of indexation on the abovesaid case. 

Thanking you,

Ramesh Chander