I am designing a report in which I have a column that is for "Total Listings" and this "Total Listings" number is the "Sum" of some other entries in a form. The "total listings" shows up fine in the report for each entry, but when I try to total the "Total Listings" at the bottom of the column I get an error message, when I put in =Sum([Total Listings]). What am I doing wrong? Thank you.