Calculate Total on a Table Column

Summary

Calculate Total (Custom Footer Template)

Content

Hello,

I need a little guidance here.  I've added a Custom Footer Template to my table but I am unsure how to populate the variable for the total in a particular column.

The data I would like to summarize resides in a Business Object so I cannot iterate over it with JavaScript.  The documentation says that the Custom Footer Template provides access to column data for passing to a JavaScript function.  How do I access the column data in the function?

Thanks,

Steve