I have created a PO with 500 per kg which was made on march 11, i have done partially migo for the month of April the Fi document which i system had generated @ 500 kg. Now i have check the Migo Document for May for another partial Qty which system generated @ 700 kg.
I have check in system, but i dint get know the reason, the price have been change
Check the Table EKBE for the Material using SE16. This might give you additional information of the Material.