A Sales Invoice 2 is a document used to record and track sales transactions. It is typically issued by a seller to a buyer, and can include the purchase price, taxes, shipping costs, and any other relevant information. There are two types of Sales Invoice 2: pro forma invoices and formal invoices. A pro forma invoice is a preliminary document created before the sale is finalized; it provides an estimate of what the buyer will be charged, and typically does not include taxes or other fees. A formal invoice, by contrast, is issued after the sale is completed, and includes all relevant details, such as the purchase price, taxes, shipping costs, and any other fees or charges.