Purchase order business scenario

we get a sensitive and captious concern script which impact the outgo of the point and our operation. To  put the scenario:

in our concern discourse we whitethorn have two oregon much shipment from 1 acquisition order let's accidental from 1 purchase order we person 2 shipment with antithetic transportation clip with antithetic mode of shipment by oversea and aerial the 2 shipment outgo is precise antithetic erstwhile the point delivered successful the warehouse but successful SAP we can't modify the transportation cost/delivery information aft we done bully receive for the archetypal shipment. And the users are challenged to include/modify the transportation outgo successful the aforesaid acquisition bid which is the good receive is done.