I have a custom subform (created using a repeater in a ListPart page) where I want to display posted sales invoices (Sales Invoice Header) associated with the current record. Along with from inside the Sales Invoice Header, I also want to display the Unit Price of that specific invoice in my subform as well.
This is my attempt:

But results in 0.00 for each of the Unit Price fields within my custom subform:

What am I doing wrong here?