I get packages, envelops, of muffin mix, just add water, at the grocery store for under a dollar. Use a small muffin pan, more muffins, with papers. You should only need 2-3 packages of mix. A fruit pizza is good and refreshing. Pick up some fresh fruit and/or veggies and make your own fruit or veggie trays, to me the pre-made fruit and vegggie tray are expensive.
The no bean chili cheese dip is a good idea but I, like many, can't have MSG and I haven't been able to find a canned chili without MSG. Whenever I go to an event I have to ask if there is MSG in the food. However I know fresh fruit and veggies are always okay, not the dip. And muffins are okay.