Sum of Columns not working

  • Hi,
    I’m trying to achieve the same result as the “Single Page Form” on your demo site. I have 2 list fields, each with 2 columns.
    At the bottom I have a number field for “TOTAL”. I would like the sum of all the figures entered into column 2 in both list fields to populate the “TOTAL” field – just like on your demo “Sum of Column 2” field.
    I have copied the “Gravity Forms List Field Calculations Add-On” php code into my functions.php file.
    And in the “TOTAL” field I have enable calculations and inserted {:1.2} + {:3.2}.
    But as you can see from the link, the “TOTAL” field is not updating with the sum of each column 2.
    Any ideas?
    Thanks for your help,
    Ian

    The page I need help with: [log in to see the link]

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