About passing vendor freight charges to my customer

You can enter freight charges on the customer order, which are then recorded on the purchase order.

Freight codes, which are defined in the Billing application, let you bill customers for the cost of shipping the goods. When you enter the customer order, you also enter the freight code and optionally the freight charge. The application creates an add-on cost for the purchase order. After you approve the vendor invoice, the add-on cost is passed from the purchase order to the customer order. The customer is then directly billed for the freight charge.

If the vendor sends freight charges to you after you billed your customer, then you can enter it as an add-on cost and create a new customer invoice for only the amount of the freight charges.