Please understand my poor English before reading 
Intro
I receive the data periodically and my job is to update the data by the workflow.
However, a lot of changes has to be made before operating the workflow, because among the vast of data, I just need to choose and change the "recent date"
Question
The question appears on the formula!

There are more formula like the picture, and I just need to change the YYMM from [AVG_SALARY_YYMM]
Excel was my tool to change the date; however, I am wondering if there is the alternative for the case like this.
It takes a lot of time to change hunders of the formula like this :<
If there is any preference please tell.
Thank you for reading