It looks like the error message in your JPG is cut off, and the XLS Form PDF is a bit hard to read (for me at least) since the calculations overlap into other cells and it's a static format so I can't change cell widths.
Could you possibly provide the full text of the error message, and also provide the XLS Form in table format?
You have a loop here
You cannot give finisher_number to a function then get a value back into that same field. The would create an endless loop.
Dependency cycles can be hard to understand so I hope that makes sense.
Hello @Katherine_Clark and @DougBrowning
Please let me know your thoughts, much appreaciated!!