Here is Manu Pubby' article https://theprint.in/2017/12/01/rafale-deal-govt-passed-option-buy-e59-mln-unit-cheaper-eurofighter/ "In fairness, the Eurofighter Typhoon offer was for the larger order of 126 jets involving better economies of scale. The price for 36 flyaway jets was not discussed as India did not engage in detailed talks with the consortium." It seems GOI and IAF favored Rafale for many reasons - they were familiar and happy with French aircraft. GOI wanted negotiations to end, support for Kaveri and as per process Rafale was the lowest bidder. I have doubts as Eurofighter's last minute bid was process compliant - but not sure if that. If it was compliant, there had been the possibility of another round of bidding - but India was probably already talking to France on offsets then. I never understood how Reliance came into picture replacing HAL though.