This file is a Sales Invoice Template, which is created so general that can be used to create invoice used in many business fields. From the layout and contents of the template, we can see that this template includes fours main parts in total, the contact information about the seller and buyer, the details of the transaction and price, some terms and the signature. It shows an example of a typical invoice. However, the part showing the details of the transaction seems a little confused and hard to understand. This part usually includes the product name, quantity, description and unit price. You can download this template to add the missing information or review a more detailed one.