i don't know about yr church, but in mine it is forbidden to ask fees for any sacramental service.
i didn't give a chrismation gift and my priest is still speaking to me after 3 years, so i don't think it's expected (i am sure one of the aunties would have pointed it out to me).
if u have money, an anonymous offering in the church money box / basket would be nice, this way no-one knows how much / if u gave anything and the glory goes to God.
i suggest u give yr priest the 'gift' of regular attendance, encouraging him and the other church members, working at yr spiritual life and attracting others to the church!
and many years! may u know the peace that is beyond understanding and may God be glorified in yr life