It is also possible to export the tree plantations from the app. Currently, however, only CSV is offered.
To get to the CSV export you have to navigate in the admin to My Apps > Tree per order - Export
There you will find the possibility to generate a CSV file. You can even filter by date, status and currency.
At the bottom of the CSV file you will also see the total of all tree plantings in a given period. So you don't have to manually count the prices in the admin. If you filter by currency, you will also see only the total for the selected currency.