Above mentioned discrepancies are mainly caused by differences between:
- the item's net unit price registered when booking the purchase order and later on posting the corresponding Goods Receipt
- and the "final" item's net unit price registered when posting the purchase invoice
In the window appears a listing of all invoices that are matched to goods receipts. The matching of the documents is done when documents are created by using the information of the other document: for example by clicking the Generate Invoice from receipt on the goods receipt or by clicking the Create Lines from button when creating a goods receipt to select the invoice.