This is a good one. It's amazing how quickly lunch adds up. Where I work, there's a fully functional cafeteria that's open from 7:00(?) to 1:30 plus a mini-cafe/coffee bar that's open from 7:00 - 4:30. If you're not thinking about it, you could easily spend $15 - $20 per day. $4-5 -ish for breakfast. $7ish for lunch A grande coffee = $4. A smoothie or maybe ice cream in the afternoon = another $3. That's almost $20 a day. $400 a month, if you go to work every day. But it doesn't seem like a lot of money, if you spend it a few dollars at a time.