Calculating on selection

Dear all, 

I have a simple table  which has some values. For example 

Name   A       B 

Sujit      12.    10

Thakur.   9.      12

Mahi.      62.     63

Sujit.        56.     67 

This table will be as it is displayed using table visualization. 

Now as you see I have "Sujit" two times in above table 

What if my customer wants to see table as shown above but he also wants a seperate table below above table , from which both rows of name = Sujit is selected it will give summation of the values in another table