Graduation party gift giving in return

by Robin
(GReensburg,Pa)

How do you handle this.

My daughter graduated .. we planned a party sent out invitation to people.. some of who as well had children graduating.. many of those people did not have parties or celebrations but had private events with family however they attended our party which was wonderful and gave our daughter a gift($$$$$) to those who attended who had a son or daughter who as well graduated at the same time but had no party should I essentially give them something as well.

I received no announcement or invitation.

How do you handle this?

I thought at one point sending half of what they gave my daughter back..

HELP!