When I graduated from college, I moved in with my parents for a few months while I searched for full time employment. Actually, I was employed full time, but it was as a night shift "manager" in a warehouse where the other night shift employee (yes, singular) sometimes showed up. The company was so backed up, that they would take me for as many hours as I was willing to work provided that I showed up no earlier than 2PM. I usually left a little after midnight.
Unfortunately, after the afternoon shift left (usually the overtime folks were out by 5PM), the lights went on motion sensor. If I stood in one place too long (which happened a lot because I was processing returns), I had to quickly run from one end of the warehouse to the other to get the lights to flip back on.
Anyhow, during those months at home, my expenses were just above zero because my mom was so happy to have me doing some cooking and cleaning around the house (she was recovering from cancer and needed rest). During this time, my budget looked like this:
Money on Hand (as of graduation): $7000
Insurance (1 year): $612
Gas (per month): $100
Interview clothes: $1000
Junk food from convenience station: $.79 per work day (Diet Coke).
For three months I didn't deviate from this budget (other than to pick up a few items from the grocery store at my parent's request) despite the fact that I was now earning real money (or at least real to me, I was probably on track to earn close to $40K if prorated over the year).