OTBI - Which Subject Area/field provides "Total Unit Cost" value from "Review Item Costs" UI?

Hi folks, I'm struggling to find the correct subject area/field within OTBI that calculates the "Total Unit Cost" shown in the "Review Item Costs" UI (Supply Chain Execution -> Cost Accounting -> Review Item Costs). I'd like to add this value within a custom report but all but one "Unit Cost" fields that appear within the Cost Accounting role have yielded blank values (the Costing - Transactional Cost subject area did provide a value but it's not the actual cost of the unit).

Where does this value live?

Thanks for any help!

- New Oracle User