lock specific cells in table but allow user to add rows

Hi all

I'm trying to create some code that will allow a specific table range to be locked so that users cannot change necessary formulas, but I also need the add row function to be available.

Everywhere I've looked seems to say that this can't be done, unless code is created that lock the cells until the user adds a row, at which time the code would unlock the cells, add the row, and the lock the cells again.

Anyone have ideas how to make this work?