Miscellaneous refunds from the cash drawer

Q: How can I enter a credit for pop machine refunds, and show that the money was given to them from our cash drawer balance?

A: This is basically like entering a negative sale.  Use the P.O.S. if you have it, or else use Unbound Transactions (basically just click the cash register icon in the toolbar).  Enter a Charge transaction with a negative amount (so it's like a return) and select an appropriate category, and then enter a Refund transaction to show money removed from cash drawer.  If you can't enter a negative charge then you can also use a Credit transaction, though this is less desirable for reporting reasons.