Microsoft Excel provides comprehensive data formatting, calculation, reporting and analysis facilities, so many people use it as an invoice creator. However, Excel is a general-purpose desktop tool, not specialized to store, organize, and manage large amount of data. Excel Invoice Manager combines the advantages of Excel and back-end databases, and lets them do what they are best at. Use an Excel template/workbook to create, calculate invoices and reports, and use a back-end database to store and manage all persistent data like customers, products, invoices and payments.