How to calculate the sum of dynamic value inside the repeat group

Hi Team,

My query is, how to calculate the sum of dynamic overall score value which is inside the repeat group.
say ex:
I am in need to calculate the multiple student overall value which is inside the repeat group

Section B (Repeat Group)
Dynamic Overall score value of Sita (student 1) : 76
Dynamic overall score value of Ram (student 2) : 19

How to calculate the overall score of Sita & Ram?
How to display the overall section B score?

Kindly please help me out!

@Thenmozhi, this post discussed previously should help you solve your issue: