How to receive Items at free of cost from customer ,these items are procureble from supplier.

Hello Everyone,

Our client got one new project(Piping manufacturing) from their Customer. For that project, they will get some Free of cost Items from the Customer that the client is planning to store in a separate sub-inventory.

Now if we consider a miscellaneous receipt to receive this item in the sub-inventory then how to exclude this sub-Inventory from costing.

Let's assume that Item A is one common item which we procure from a supplier with some cost and the same we get from the customer at free of cost (0 SAR), costing method is Perpetual Average so if we review the Item cost then we can find it affected due to this transaction.