I think I understand the offset approach. In your first code above, would changing the "A & x" to "B & X" be a way to tie the line items together? For example. If Column E says "Audit Error" on detail report, and I wanted to isolate the line item in column B. Then match that line item to Column A in As Built, then offset that value by +6 to add the quantities in column G (Line item sits in Column A on As Built, and Ex Quantity sits in Column G.)