In Sales Invoice in the "Document Detail" press button "Add New". Opens Goods Directory. In the directory, select a goods that must be added to invoice. Sale Parties Editor opens.

Quantity

Quantity of goods, which expended. When you open the editor in this field is the default number (from the item card).

Sale Price

Retail price of the goods. You can enter the price manually or by clicking on the button "...", install any of the reference prices for this Good.