Creating a bucket in NAV

Hi guys ,

  I would like print the invoices for each customer on the basis of 0-30,30-90. 90-150 days in NAV Classic client ..I have went through the customer aging report as an example but i have no cluue on how to do this.

Have anybody went through this earlier please help me on how to do that ,

Warm Regards

Bharath K

Thanks in Advance