You can export transactions to a spreadsheet.
This can be useful for creating separate backups, or for creating reports that are not covered by the Bowlr system. Once the transactions are exported, the information can be edited in any way using a normal spreadsheet program like Excel.
Go to Accounts -> Export
On the next page select Export all transactions.
This creates a download for a CSV file.
This file can be opened by Microsoft Excel and other spreadsheet applications. Once opened you can manipulate the data however you need.