When receipting stock, due to varying issues (GST, levels of decimal precision, discounting et al.), the value invoiced will often not marry up with the value received. Please see attached screenshot of conversation with support representative Jackson McCulloch explaining this. Increased productivity, and speed when receipting stock. It also allows for the Xero integration to be trusted, rather than have to dedicate a bookkeeper to adjusting the General Ledger for each invoice. Relevant Screenshots:
https://netoecommerce.wufoo.eu/cabinet/bXd4ajJoNjBxMnh0aGk=/6GwuBe4MpV2wPg=/netoconversation.png