Receipting the supplier's invoice against the purchase order costs and quantities will update the actual costs on the job.
If all the items on the purchase order are received, you can produce a full receipt. Costs for all items on the purchase order will be added to the job.
If some items have not been received, you can produce a partial receipt (or a series of partial receipts) to reflect the actual delivery status of items. Costs for received items will be progressively added to the job.