I spend about $200 every 2 months (or $400 per term) on Techcash, and that's eating breakfast and lunch on campus five days a week (and buying magazines at LaVerde's

).
I think it seems that I spend $50-$100 at the grocery store every 2 or 3 weeks (cooking for 2 people, but I'm not sure that cooking for 1 person would necessarily be cheaper -- you'd just have to throw out a lot more perishable food!). Maybe for one person you could go with the low end of that value.
Don't forget to add a little extra for those days when you just can't force yourself to cook and Thailand Cafe delivers in under twenty minutes.
