If you're looking for a cheap and quick bite to eat, Panda Express is great.
For around $7 you can get a 2 entree meal. If you and a friend aren't too hungry, 2 people could easily split this meal.
Their Large drink is more like an Extra Large. So if you aren't too thirsty, just get the Medium (which is like a large). You can save a little there.
You may already have your mind set on Beef and Broccoli (For Example). However, who knows how long the food has been sitting there?
If you want something more fresh, before standing in line to order, take a look at some of the dishes. This way, you can spot what looks good and what looks like it should have been thrown away days ago.