Add a product you do not stock yet, without stopping the buying
Scan the unknown barcode and add the product on the spot, with its name and unit. The buying carries on with the rest of the delivery.
In every editionKnow which till, bank or wallet a supplier's money came from
The payment form asks which account the money came from. It starts on the till, and you change it to a bank or a wallet when that is where the money went.
In every editionUse the money a supplier owes you to clear the bills you owe them
The pay dialog offers to use that money first, starting with the oldest bills. Anything left over is settled the usual way.
In every editionUse what a supplier owes you on the purchase you are saving
The credit is applied to the new bill when you save. If that step fails, the purchase still stands, the credit is left as it was, and the saved page says so.
In every edition