As stated above, you have picked a very poor way to store the data, making it actually harder to get the results you want. You have to pull apart character strings, change the resulting character strings to numeric, and then add. Nevertheless, here is some UNTESTED code for you, since we can't work from screen captures (if you want tested code, we'd need the actual data as a SAS data step).
data want;
set have;
array a{*} a2-a6;
total=0;
do i=1 to dim(a);
total = sum(total, input(scan(a(i),1,'('),2.));
end;
total=total/30;
drop i;
run;
If the above code works, please don't simply say it works and leave. Please take to heart the advice you have been given not to store numbers in complicated text strings, so that next time you are in this situation, the process of addition is much simpler.
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