I am being offered 6000 PLN/month. What is the cost of living family of two (Warsaw)? pls advice.

Dear all,
I am planning to move poland in next month (university of warsaw). They offering me a 6000/- polish zloty per month. would it be sufficient to stay at warsaw with minimal needs (apartment/studio, groceries, and other basic needs). I have family of two (Indians). Please give your advice.

Is that gross or net?