Perpetual inventory system inventory accounts do not provide information on inventory whenever needed.

The first transaction in the sales transaction in the perpetual inventory system is record the amount of revenue and increase either in cash or in receivables. 

Transportation costs are recorded as “delivery expense” if the shipment is FOB destination. 

In FOB shipment point, the seller has no responsibility related to transportation. 

The second transaction in the sales transaction in the perpetual inventory system is record the amount of COGS and decrease in inventory.