Cost of living in Montevideo (Uruguay) is 108% more expensive than in Rostov-on-Don (Russia)
This comparison has some inconsistent or sparse data. It already provides a reliable comparison but it is not bullet-proof. It is based on 1,421 prices entered by 135 different people.
For example, you would need at least руб 205,449 ($U100,516) in Montevideo to maintain the same standard of living that you can have with руб 99,000 in Rostov-on-Don.