a formula tool that can refer to multiple field and dynamic field

[PangHC]

can we have a formula tool to refer multiple field (especially dynamic as well) 

i KNOWN we can use transpose and crosstab tool. but it silly to do one thing with two tool.

Problem

To sum all the fields in the file. so now is A-D. 

I can use formula tool to do it. easy. But, what if fields add / delete frequently?

Now, it sum A-E, what if G-F tomorrow, and B-Z after tomorrow, i do not want to update workflow every time.

suggestion :

I hope we have a tool that similar to multiple field tool, but it output to a new field only.

I KNOWN SUM() is not alteryx function but just an example. we can expand further other formula for string and date.

[CristonS]

thanks for your feedback @PangHC, that would certainly be a robust feature!