In addition to the non-binding estimate, Arpin of RI offers a firm Binding estimate type that locks in all of the estimated charges so the actual costs are fixed regardless of the shipment’s weight. The price cannot go up and it cannot go down. Keep in mind that the costs associated with those shipment items that were originally listed on the order for service to be moved or packed are fixed. If the customer adds additional items or services, the binding price is invalidated and the final charges will be based on actual services performed.