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If you need to know where the units with particular serial numbers are stocked, you can use the Warehouses > Reports of Warehouses > Serial Number Balances (by Warehouse) report that lists available units of the serialized items in each warehouse.
If you need to know which units of serialized items were purchased from which suppliers, use the Warehouses > Reports of Warehouses > Serial Number Balances (by Company) report that lists all the serialized items with assigned serial numbers by supplier company.
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