How to zerorised the stock value and make it non-valuated

Hi guys,

I am just wondering if I want to make several material stock to become zero-rized value, how do I do this in the system?

The reason is because we have a 1000kg of material stock A1 which our management want to make it zero-rised the value, and to become non-valuated because the business process had changes for these material.

How?

please advise.

Thnaks

Tuffy