the gas bill

We got our gas bill yesterday.
It’s a magic gas bill.
We don’t have to pay it.
Somewhere along the line my housemate and I must have blythely paid gas bill after gas bill without realising that each of us was putting money into the account.
Until one day we noticed that the gas bill wasn’t actually a gas bill at all.
It was a statement telling us that we were $300 or so in credit.
So now when they arrive, we don’t pay them.
We watch with interest to see how much comes off the credit amount.
I think we still have a couple of bills to go before we’ll have to start repaying any money – and start paying more attention to the process of bill paying.