I like Wendy's. They are cheap and even though they aren't expensive, their food isn't nasty. You can buy a salad, a baked potato, chicken nuggets, a hamburger, or a big drink for only a dollar.
The nice thing about Wendy's is that you don't have to wait in line for an hour to get your food. They get you in and out so if you're in a hurry you don't have to wait too long.