Print GroupWise Sum details in another Group

[naikniket.31]

I am using jasper studio and I want to print a Group-wise sum in another group footer for better understanding take a look below.

Class Group Header: Class One

Student Group Header: Student One

 Subject | Total Marks | Obtained Marks  ABC    |     100     |   50  PQR    |     100     |   80  AER    |     100     |   30 

Student Group Footer: Student One Total Obtained Marks: 160

Student Group Header: Student Two

 Subject | Total Marks | Obtained Marks  ABC    |     100     |   20  PQR    |     100     |   10  AER    |     100     |   30 

Student Group Footer: Student Two Total Obtained Marks: 60

Here above I can print each student's obtained marks separately in the student group footer, but I want to print the same in the Class group footer which means I want output like below

Class Group Header: Class One

Student Group Header: Student One

 Subject | Total Marks | Obtained Marks  ABC    |     100     |   50  PQR    |     100     |   80  AER    |     100     |   30  

Student Group Header: Student Two

 Subject | Total Marks | Obtained Marks  ABC    |     100     |   20  PQR    |     100     |   10  AER    |     100     |   30 

Class Group Footer:
Student One Total Obtained Marks: 160

Student Two Total Obtained Marks: 60

How can I achieve this result? Thank you in advance :)