A special scenario of vendor consignment

Hi, friends

It is well known that GR of consignment stock is not valuated,

only when post goods issue to consumption or transfer to own-stock, the stock is valuated,

and the withdrawal is valuated with the current price of vendor consignment info record.

But in my company, as the agreement with vendor, we must have a price in consignment PO, and the withdrawal must be valuated with the PO price, not the current price of info record.

So, does any frients have ideas in this scenario?

Thanks!

Sean.gao