Field help (PTHGROPRI) 

This field is used to determine the Stock cost per unit of the product. This price is expressed in the receipt unit. When the principal information for the line necessary for the determination of a price list is entered, a price list search process is automatically carried out. The objective of this search is to recover:

If the price list search is unsuccessful, then a search is launched on the base price of the purchase product. As a last resort, if the search on the base price does not return any result and if the PURPRICE - Price by default standard cost parameter (ACH chapter, PRI group) is set to Yes for the company of the receipt site, the standard cost is used to value the gross price (if it has been defined for the product).
When the entered price is null, a message is displayed requesting your confirmation. From this field, click the Actions icon to:

In the event of an inter-site/inter-company receipt, or in the case of a purchase order receipt, the gross price and the discounts are initialized with those of the source document and cannot be modified.
SEEINFOPrices and discounts can never be accessed if there is a source document. They can be entered/modified only in case of direct creation of a receipt. During a direct inter-site receipt, if the original delivery prices are tax inc., they are converted into ex tax. on the receipt line.

This information will be used during the creation of a supplier invoice or an invoice to be received to value the invoice.