Can I have Group1 totals broken down by group3 database field?

Question

I get requests to create reports with the following type format, and with more group levels each needing totals broken down.  I have been able to create these reports using arrays and doing it all myself without features of Crystal reports.  Is there a simple way to do this using Crystal reports features.
Report Heading:----
Jan    Feb   Mar                      Dec   Total
Group 1: Product Class Bikes
Group 2: Product Two Wheller
Group 3:Sales Type Cash             $10
                                Amex            $20
                                 Visa              $30
                                 Total             $60
Group 2: Procuct Three Wheeile
Group 3: sales Type Cash            $20
                                 Amex            $30
                                 Visa              $40
                                 Total              $90
Group 1: Totals        Cash             $30
                                Amex             $50
                                Visa               $70
                               Total              $150

Answer 1

When I set up the cross tab  group 3 shows the break down but group 2 and group 1 just shows one total line.  I want to see the same break out as group 3 shows.  If I can do it using a crosstab you will have to explain to me how to.  It would make like a lot simpler for me.