It depends on what you consider "reasonable", but I found the food court to be overpriced. If I were on a budget, I would pack food and bring it into the food court to heat up. They have a couple of toasters in there and you could heat up poptarts and any other kind of toaster pastry you might choose. The toasters are the conveyor belt kind that dump your item down a chute, so they are not appropriate for something like cheese broiled on bread (where the topping could slide off), but they are fine for everything else.
The fruit is particularly outrageously priced, as is the bread for toast, so I would bring your own if you tend to eat that kind of thing. I bring my own oatmeal (or other hot cereal -- like DMRick!) and add the boiling water for tea, which is dispensed at the beverage counter outside of the cash registers. The toasters are outside of the cash registers, too, so if you bring your own stuff you won't have to take it past the cashiers and try and explain that it's yours and not theirs!
All the drinks are pretty expensive, too, and I usually bring my own in a small cooler which I keep in my room, then keep them cool with ice from the machines near the staircases.