Unaccounted inventory transactions not to be considered in current month's Cost Accounting

Summary:

Our client implemented inventory and cost management. Inventory transactions are carried out in 3rd part system and are interfaced to Oracle fusion inventory. Those will be costed in Oracle fusion.

They have some integration issues which forced them to stop integrations for sometime to correct the integration logic. Now, When we run cost accounting, processed transactions from the previous months are part of the current month's costing which led to huge difference in numbers. ( Currently they are comparing 3rd party legacy system with Oracle Fusion).

In Oracle, they closed the accounted periods by manually adjusting the numbers for previous months. Now, to streamline the cost accounting process, they would like to consider only September month transactions ignoring the previous months transactions which were already closed.