I've got a program that saves 
- folders as  ABC.123_LMNO_P4_Q5,1  (with the ",1" at the end as what is stuck at the end, the other alphanumerix are placeholders), and 
- filenames as ABC_123_LMN_P4_Q5.jpg,1  (with the ".jpg,1" at the end as really truly what is there)
for each of these, how do I set up BRU just to get rid of the final ",1"?