selling the goods loaded in vehicle after taking the order at customer poin

The sales process for a scenario goes like this, every day certain qty of material is loaded in vehicle and at each customer point order is taken material is delivered. How to bring this process under SAP.Ex(Dealer loads material in his vehicle goes to his route takes order from retail stores). So stock should deduct when certain material is loaded, unsold stock have to taken back at the end of the day. Thus every morning stock deduction and in the evening stock up has to take place.