Recording what I'm being charged

Before a mod says to use the search, I DID and didn't find what I was looking for and hope this forum could help.

I just signed up to have my driveway snow plowed when the service plows our road. I want to keep track of the charges so at the end of the month I'll have an idea what I will be paying them for services rendered. I tried an Excel check register but kept getting Circular references error code.

In the check register I'm not starting out with a plus amount, it's a zero balance, I'm expecting to see a negative balance in the balance column. At the end of each month I'm charged I will pay them that amount and show that being done and have a zero balance showing again. I have been using the Excel Check Register for my personal checking, for many years but never had a reason to alter it, so that is why I'm hoping to find some direction / suggestions here.

Worst case scenario I'll have to do that in a text document, but I'm hoping I've explained myself good enough so someone can offer me some direction, and thanks.