To access your item sales summary head to Reports > Item sales summary.
This report will show you your best sellers based on the standalone revenue that the item has generated.
The report will list...
Item name
Item type - appointment/ session/ area booking/ package/ product etc.
Standalone sales - these will total any sales within the date range selected. This is any item that has been added to a basket directly
Sales in packages - these are any of the appointments/ session/ products that have been sold as part of a package
Standalone revenue - this is the revenue generated
The report includes net revenues from all submitted orders with a revenue date between the chosen dates.
You can export this report into a spreadsheet by selecting the 'Export' button.