An invoice summary is an official business document that summarizes the amount of money that a customer owes for goods or services that they have purchased. It is typically used by businesses to track their sales and accounts receivable. The invoice summary includes the total amount due, the due date, the payment terms, and any applicable taxes. It also includes a breakdown of the items purchased, their prices, and any discounts that may have been applied. Invoice summaries are important for businesses to keep track of their sales and to ensure that customers are paying the correct amount for their purchases. They are also used to provide customers with a clear and concise record of their purchases and to help businesses stay organized and efficient.