Hi Bangli, You dont need to change anything. Just apportion the qtys. For example: you can have 2 items A and B with a total weight of 100 KG. A weighs 30 KG and B weighs 70 KG, if you want to apportion an item charge of 10$ then you select the item charge line wiht a Qty of 100 and then in the Charge assignment enter 70 and 30 in the respective Lines of B and A. Then assign by amount. This should help you. Thanks, Best regards, Prashanth pbg@navilogic.com