Remember my party money question for allergy students?

I never ended up emailing the class mom because I kept forgetting.
Another class mom had mentioned that they did this online sign up sheet for donated items (signupgenius.com). So I started to wonder what was being donated? I look up the sign up sheet and it all drinks, food snacks and candy!!! I of course signed up for one of the items, but I am really annoyed that they even have a sign up sheet. There was at least 15 items on there also. What was the point of the $15 then? If they do that for every party, then I am paying more than $15.

So can someone draft up something for me so I don't sound like a byotch or cheap