Surgery for bestfriends family cat.

My friends cat, was playing around and hurt her jaw. They took Luna into the vet, and was told she needed to have surgery. The doctors told them that she had a broken jaw and that she needed to have surgery before next Saturday. If they aren't able to get the money together by then Luna will have to be put down. The surgery cost around $452.71. Their family cant afford it, so I'm trying to see what I can do to help. Please, even if it's only $5 it would make it a little easier for them to reach their goal.