Crystal Reports report on subsequent payments

Message

     I'd like to find out how to create a report that shows customers who paid their membership after the promo ended.

For example:  A fitness center

A new customer is offered 2 free months of membership.  The renewal amount after the 2 free months if $99 dollars. 

I need to create a report that shows how many customers paid (continued the membership) the subsequent fee of $99 after the first 2 free months. 

I'd like the report to show:

Customer Name   January 2008 February 2008 March 2008  April etc.... 
John Adams            0                       0                   99                 99
Steve Smith            0                       0                   99                  0
total                        2                       2                       2                1

I'd appreciate any help from anybody,
Thank you.