Finding and your answer
SalesOrder.OrderGrossValue column
Not found in this gold boundary
99%
How the model read it
The workbook requires gross order value before discounts at order grain. Current gold contains Ledger.SignedAmount at finance-ledger grain, which is not a semantic or structural match to gross booked order value.
Workbook evidence
Cited current gold
Open questions
Does gross value include tax, freight or other charges?
Which currency fields and conversion rules are required?
How are cancellations, returns and subsequent order amendments reflected?