Sum column total from another sheet if checkbox checked

Josh R
Josh R
edited 12/09/19 in Smartsheet Basics

Hi, I've seen this done on same sheet but I'm having trouble accomplishing my goal trying to pull from another sheet.  

What I'd like to do is on "New Sheet 1" have the "Done" Column total update from the "To Do" Column from "New Sheet 1b" when the checkboxes are checked.

Thanks in advance!


Capture Smartsheet 1.JPG