Curious why IFS limits characters here?  I get a 15-18 character limit for the actual / final value (in this case would be 36, but it’s a bit limiting to have a feature that allows for in-place arithmetic but with short limits into the actual text box (25-50 would be more appropriate).   A use case would be a calculation like  120000.37 + 12111.75 → which is not allowed because of the current character limit.

this particular place is in the manual voucher entry page but we can see this occur in other places as well.