Since Jellyfish is an ordering system for Retails to Suppliers, there is not a function in Jellyfish to create Purchase Orders for a Suppler to replenish inventory. Items within the Supplier account are not required to show a quantity on hand (QOH) for the item at all.
Integrating with Xero connects the dots for Supplier accounts to account for Purchase Orders. In XERO, once a purchase order has been created, "Mark as Billed" and approved, any items on that PO that are being tracked in Xero, will update the QOH in Jellyfish.
Before getting into this article, it is important to understand what it means when an item is tracked in Xero. Proceed to the article link below if you are unfamiliar with tracking items in Xero. This is important if you want any QOHs to update between the two systems automatically.
Purchase Order Process after Integrating with Xero