This is probably a really dumb question, but how in the world do you sum or better yet, use a list of macro variables with just the "-" without having to write out evey single &var_1, &var_2.....&var_i. I use this all the time for non macro variables, but thought it would be the same for macro variables.
"using a list of macro variables"
is close to a thread I worked on earlier
"list programming with sas "
1 here is a list
2 here is a process
3 how to apply the process(=2) to each item in the list (=1)