We have set up a costing sheet which is planned cost where we have included shipping, customs and commission on purchased items. Sometimes we buy these from Asia and sometimes internally from another company in the group (ICT). When we then create a purchase order in company B that becomes a sales order in company A (through ICT), we get calculated costs for shipping and duty on the purchase order in company B (but these charges were already taken by company A when they bought the goods to its stock).