Adjust inventory stock value


I would like to get advice for the below scenario.

During go live for ax2012 R3, my customer only able to provide the opening stock qty but without value (About 5 thousands items). These stock were migrated into Ax and then started with the issuance and receiving transaction.

Now at month end, then total inventory value is not correct mainly due the stock opening not correct.

My proposal to the customer is they need to manually adjust the stock month end “on hand” value 1 by 1 (meaning about 5 thousands records). This method is to make the next month opening stock value accurate as possible.

Is there another option or faster method. Pls advice.

Thanks in advance.