Improve compliance with a Metrc-compliant POS for Maryland that tracks product amounts via the POS

https://wiki-global.win/index.php/Maryland_Seed-to-Sale_POS:_Keeping_Packages,_Sales,_and_Transfers_Aligned

Improve compliance with a Metrc-compliant POS for Maryland that tracks product quantities by the POS and assists in keeping METRC stock aligned with each and every transaction.