How to inventorize the value of a condtion of a PO during GR

Hi,

I have a senario where a value of a customized condition of a PO has to be inventorized while doing GR. Example

Base value 100

XYZ condtion 10

GR Entries should be:-

Invenotry Stores & spares Dr 110

Gr/IR Clearing Goods Cr 110

Please help to provide the step by step process to achive the required senario's.

Regards,

Mohar