There are two reports that would show top items sold: the usage report and the sales report with the filter option items sold summary selected.
Depending upon your selection and date range, each report has it's place.
- The usage report is for doing a smaller date selection for a specific selection or category of items. The report should be exported to excel and sorted to see the top items sold.
- The sales report is used for larger date ranges, and it reports on everything in that date range. The report should also be exported to excel and sorted to see the top items sold.