Very practical code setup there. I just had to add a "Trigger once" condition because it wouldn't stop adding without it, I also dropped the +1 for loopindex (no effect, no issue) and instead of using a loop repeat event (wasn't responding but no effect, no issue) I used a "For" and named "CurrentSum" as the loop, then set it 0 to 3 :
+ System: Start of layout
-> INI: Set INI file to AppPath + "math.ini"
+ System: Trigger once
+ System: For "CurrentSum" from 0 to 3
-> System: Add INI.ItemValue("Math", "Value"&loopindex) to global variable 'CurrentSum'
-> Text: Set text to global('CurrentSum')/3
Thanks so much, Aphrodite! This prevented an ugly expression. I really appreciate the help!