If this is a subcontract you report setup cost instead of setup time, containing information about the current report number that is loaded from the operation row in the preparation. The unit will be changed to the currency that is registered for the operation. When reporting shipped quantity the setup cost is not reported, then this field show zero and is greyed out. Instead, the cost is reported when you report the quantity that has returned from the subcontractor.
When reporting subcontracts, you can create a supplier invoice basis. This is determined by the setting Create Supplier Invoice Basis during Subcontract Reporting? under Accounts Payable under the Purchase tab in the Settings procedure. In this case, this field will show zero and is greyed out and no subcontracting cost is entered here, but this takes place when the invoice is registered in the Register Supplier Invoice procedure.