6,700PLN is $5000 based on a 3.34:1 ratio
All I was trying to ask was what was the average monthly/Annual salary based on the original posters post and your comments.
Lets go back to just using dollars then if it is easier for you. No ratios are required in this simple formula I think :)
Basically you are saying that 5000 USD equates roughly to 17,000 PLN and that is a monthly salary. Then you said that
Some people earn much more than 17,000PLN a month. Try quadrupling that amount
So I did ! So 17,000 X 4 = 68,000 PLN or 5000 USD X 4 = 20,000 USD. And I'm just asking is that a monthly salary that you are referring too rather than an annualised one ?