Frugal Bento Month: How much have you saved?

As part of Frugal Bento Month, I've posted a simple challenge: Keep track of what you're saving by bringing bentos for lunch instead of buying lunch. I thought it might be fun to total up everyone's savings. So, use this thread to let us know how much you've saved (weekly or at the end of the month), and I'll total it up at the end of April!
Taxonomy upgrade extras: