Hello! We are having a problem that we don't know how to solve. We enter a purchase order with some costs zero and some incorrect. For this reason the margins on sales are incorrect. We use average cost for all our products. Needed : 1) Cancel the purchase order entered with the incorrect costs. 2) enter a new purchase order with the correct costs. 3) Recalculate the margins. I currently have more than 200 invoices with the incorrect cost. Can someone guide me? Thank you