Insert Stock - No Cost & Adjust Cost With Adjustment

Hey everyone, 

We have a client adding stock at zero cost into the system using a receipt and then adjust the total cost per line item afterwards with an adjustment. I used to work on the customer side and that’s how we used to add stock not already in the ERP where we needed to add a cost separately. Basically, like an inventory adjustment for goods that have already been paid for. I’m not sure if that’s correct after looking at the GL transactions. Any insight?

We are in the implementation phase and I don’t want this to go awry. I think I know the answer but I just wanted some professional insight.