GOLDFISH is the answer to everything! Or Easy Mac!
Juice boxes, granola bars........food in bulk is good. I usually eat on the run so that might not work for you.

It's too bad none of you have Raising Cane's chicken fingers where y'all are. Or jumbalaya! Mmmmmm......Jack in the Box is fairly cheap. McDonalds's dollar menu or Wendy's 99 cents menu are useful when you need cheap food.