Let us now see what does P.Sale means. P.Sale is known as Provisional Sale in the shipment.
All sale charges which are entered in the shipment costing sheet are considered under P.Sale.
Either the charge may be posted or kept unposted does not matter in the shipment. All sale charges available in the shipment are available as provisional charge and they will be able to preview in the reports as P.Sale.
Refer below screenshot for shipment charges and report screen for further understanding. There are four sale charges present and the sum of four charges is available to preview as P.Sale in the reports.