Improve compliance with a Metrc-compliant POS for Maryland that tracks product amounts as a result of the POS

https://wiki-tonic.win/index.php/Metrc-Compliant_POS_for_Maryland:_How_to_Prevent_Compliance_Drift

Improve compliance with a Metrc-compliant POS for Maryland that tracks product portions by way of the POS and helps to keep METRC stock aligned with every transaction.