Fuck I wish I lived in the US everything is so much cheaper and your high schools are so much easier.
It's $7 for a sandwich at my school and I have 2, 12 hour days. Our colleges are the equivalent of your frats and are $25,000 a year + $8,000 tuition per semester. Cheapest rent within 45 minutes of my college is $150 in a 4 person shared commission housing (Slums).
But back to the original, make a budget sheet. Track exactly what you are spending so you can cut out the unnecessary bullshit.