The Booking Extras Report allows you to see either the quantity or value of any particular booking extra you might offer, allowing you to intelligently assess which extras earn you significant extra income, and which might benefit from additional promotion. You can access this under Statistics- Booking Extras.
You can see a basic report on each booking extra by value or quantity, and, if required, a fuller report filtered by specific properties and dates.
If you click each column, you can see the details of the extra month by month.
If you wish to see a fuller report, click 'Full report' at the top of the page.
You can then filter by extra, date, property and if required, export the data as a CSV file.