In IQC raw material not good ,vendor hope scrap on site,how and where to define cost center?

Hi,Guru,

I met a question ,that is ,in IQC (in coming quality control for raw material ) ,the 6 raw material in 10 is defect ,vendor hope scrap it on site at once. My question is how to deal with the 6 defect material, how and where to define the cost center for it ?If I  use UD to enter 6 scrap ,and the cost is in our own plant, it is not a cost for the vendor.

Thank you!

Best regards,

                                        Miriam Zhao