transport costs for deliveries out of lunch time

In order to deliver all our customers around noon we have to respect some delivery circuits. If a customer wants to receive his order on another hour ( before or after usual delivery time ), HE HAS TO ASK IT EXPLICITELY BY PHONE, because we will have to dedicate a driver for this specific order. This implicates that we will have to ask additional transport costs. You can always ask in advance the amount of these costs.