Is it possible to write a google apps script that "binds" two cells together? For example, if a a cell in one sheet is edited, it will automatically update a matching cell in another sheet.
So if sheet1 had a value representing "money spent" in cell A1, and sheet2 had a value representing the same "money spent" in cell B4, I'd want to be able to change the value in sheet2.B4 or sheet1.A1, and both of the cells will always be up to date.
I'm having trouble determining how to create a trigger that could perform this.