Hello.

Can you please give us more information:
- how system currently is set up at customer (what do you mean by simple item cost)
- what is exactly customer problem with accuracy of stock movement?

Just to mention - if you use any of valuation metods you need to follow its rules in full. It can not be partly implemented or used for some documents.

FIFO is the most strict metod and for correct valuation you need to make sure chronology is followed while WA is less painfull, but still ruled.


Regards
Agnieszka