Cost of living in Mazatlán (Mexico) is 22% cheaper than in Łódź (Poland)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 359 prices entered by 34 different people.
For example, to keep the same standard of living that would require 9,500 zł in Łódź you would need to make just about 7,425 zł (Mex$ 39,891) in Mazatlán.