Issue of Product costing of Material at depot

Dear All,

As we all know that we have to do costing of material at plant level if Product costing & Profit analysis is implemented.

but in my client system is asking to do the costing of material at depot level as well for the material which are transfer from plant.

I don't know why this is happening.

System should not ask to do costing at depot level

Regards

Shayam