As said below, $$ = NP/NP. We used to have a spaghetti dinner fundraiser with a concert, but you only paid if you wanted the dinner. The concert itself was free. This does not fall under NP/NP (at least according to UIL when we used to do it years ago. We have had to limit the number of family members attending by giving tickets (3 per student). This was per admin one year. You can guess how that went over. We did it only once.
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