The Payments (settlements) reports you download from Seller Central are tab-delimited text files. The easiest way to read a Payments report is to save it to your computer and then open it in your favorite spreadsheet or database application. Then you can easily summarize, manipulate, or reformat the data the way you want.
Some web browsers automatically open reports with your computer's default text editor. To avoid this, save a copy of the report to your computer before opening it in another application.
For more information about what each column means in a Payments report, see Downloading Payment Reports.