How to compute a table display accumulated profit % contribution by group for top 3 customer ?

[paulyeo11]

Hi All

I have below Report from table 1, which can display :-

G1 Top 3 customer sales contribution = 70%

G2 Top 3 customer sales contribution = 31%

May i know how to make my Table 2 display

G1 display 71%

G1 display 31%

Paul

[paulyeo11]

my QVW