In order to get a sales report showing the information for multiple events, first head to your dashboard and select 'Sales reports' (as highlighted below) for the organisation whose events you'd like a sales report for

You'll then be taken to a page where you can choose which event(s) to create a sales report for, either use the buttons provided to add or remove all events, or to do so by their tag, or (de)select them with the checkboxes provided

You can then choose to view or download a sales report in PDF, web or Excel format