You can add an unlimited number of suppliers and supplier accounts with the opening balance in Polaris POS. You can get reports from every supplier transactions and statement anytime that you want.
You can add your purchase cost to your purchase invoice then the software automatically calculates the purchase cost of every item in purchase invoice.
You can add your supplier’s payments anytime that you want before purchase (Advance Payment) and after purchase. It calculates and develops a supplier balance/supplier statement for you.
It sounds impossible that you have purchased without purchase return or refund because there are always items are not according to the thing that we ordered. Polaris POS has plenty functions for refunding and returning a purchase to the supplier.