Crystal Reports How to generate billing invoice

Message

   Hi All,

I am developing an SchoolManagement System. I have developed the full application. Now i am tuning my application for finalizing the project and facing some problem which need to be clarified. 

My Application is printing Fee Recipts of students, but i need to print the same twice in  a single page. The Size of each should be of six inch and if exceeds it should be printed on next page.

I have used two subreports but problem here is if recipt size grows it above six inch then sub report grows on same page and pushes the second report to next page. How can i do this.

Thanks in advance. 