Freight Cost to Customer through Shipment Cost

Dear All,

We are supplying the Goods to our Customers by two ways.

1) Primary Routes      ( from Factory to a Central Location)

       Primary Routes freight cost we are paying to Service Agents by Shipment Cost which is third party vehicle

2) Secondary Routes  ( from a Center Location to Customer Location)

      This Secondary Route freight cost we need to give to our customer ( ie, to be credited into Customer's debtors A/C ), since vehicle owned by        

       customer.

We can't adjust this cost in Customer's Material Price by SD Billing.

How to pay this Secondary Routes freight cost to Customer's debtors A/C through Shipment Cost.

Pl. help us.

Regards,

Sarran