After arriving a supplier's invoice into Retailer, the Invoice Total may have a small discrepancy of a few cents between Retailer and the supplier's invoice. This can occur due to differences in rounding between Retailer and the supplier's invoice.
You can use a Rounding or Miscellaneous stock item to help balance the arrived invoice.
It is recommended to have a separate department for this so it can be tracked easily. If the invoice total exceeds the correct amount, you would instead arrive the Rounding stock item with a negative quantity.