An item catalog with categories and pricing, stock across multiple warehouses, costing that feeds the balance sheet, and branches that report separately or consolidate — one operations layer under the whole platform.
The item you sell, the item you buy and the item you count are one record — not three spreadsheets.
The stock count and the balance sheet agreeing is not a year-end miracle — it's Tuesday.
Discount arguments move from the sales floor to a pricing rule, once.
Which branch makes money stops being a debate when every posting knows its branch.