A report has one master table and two child tables.
So a report must show multiple records from one child table on the separate group and multiple records from another childtable on separate group.

The format will be something like below.

Details about the Customer.

Customer Name: xyx

------Customer Branches---------
Customer Branch 1 abc
. bcd
.
Customer Branch n xyz
--------------------------------------------
-----------Customer Products Purchased------------------
Customer Product 1 prod1
. prod2
.
Customer Product n prodn