The slabs move to Sold & Invoicing and wait for your confirmation there; the consignee sees them as Sold straight away.
The consignee is told at once. The slabs read Recall until they are accepted back in the yard.
The slabs take the receiving consignee's agreed prices once it accepts them.
The price history keeps the list price and who changed it. Sold slabs already confirmed keep the price they were invoiced at.