Your calculator would probably need to be updated? I just tried it out and the difference between the locations Mumbai and Bangalore, the latter is close to 2.5

Your calculator would probably need to be updated? I just tried it out and the difference between the locations Mumbai and Bangalore, the latter is close to 2.5x less than Mumbai (0.08 vs 0.20). Your data-source for this is very clearly wrong.. any income/cost-of-living report for India will show that the cost of living is the same for these 2 cities. Just FYI.