To access your item sales summary head to Reports > Sales > Item sales summary.
This report will show you your best sellers based on the standalone revenue that the item has generated.
From here, the dates displayed are all the dates within the date range selected:
You can then select 'Add filter' if you want to filter the report. A pop-up will appear, allowing you to toggle the 'Offering types' filter to only display items of the selected types.
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 at the top right.