What is some cheap food that that I can serve myself without a kitchen?

I have a half fridge a microwave and a kettle with no utensils or pots. I was thinking lots of Ramen and cereal. I have a budget of $500 and no car. Taxi’s cost $10 one way, but walking to the stores are o.k. I also like Chef Boy R de microwavable lasagna. The budget starts on October 1
I don’t need coffee, or tea or pop other than one meal every week from A&W teen burger and a small root beer.
I don’t smoke or drink alcohol. I don’t have any kids and no dependents.