Cost Center on organisations and projects
Set up a field to manage the cost centers by organization and by projects and ensure that this information is available on the invoice (pdf, txt, csv).
In a large organization, you want to have a single invoice for the organization, but assigned the costs to the right departments.
In addition, correct the current invoice (PDF & TXT) to add the summary of costs by project by displaying the name of the project and not its ID. See picture.