I did this with my PHP Inventory system. Add new Inventory Items, change pricing, change vendors, Inventory Payouts from Drawer, Safe, etc. I have been using it for a couple years now, and still don’t use the in-built methods. It alters the SambaPOS DB directly by doing Updates and Inserts, etc, Does not use MySQL. Also incorporates the User/Role system of SambaPOS to control who can do what.