This is a great question. Knowing more about the desired format of the report is helpful. For instance, the report could just be something viewed on screen, it could be exported as Excel, or it could be saved as a PDF file. Also, it seems kind of implied that the report may be for any possible date range that a user specifies, but knowing that detail is important, too.
@marke1415 In addition to responses that you receive here, I would also suggest making sure you understand how report layouts with sub-summary sections work in FileMaker, as well as how summary fields behave in such reports.