Hi Manoj,
the only relations where we can hunt for solutions is info record or contracts. As they are only places where we can define material characteristics wrt vendors.
However, there are no rounding value fields in the info record or contract/OA
I dont think it is possible to achieve this. The quota arrangemt here wont make any difference.
You can try adding two custom UoM each for the vendors and convert them to EA accordingly
eg: 1 UoMvendor1 = 360 EA
2 UoMvendor2 = 240EA
And then use this as Unit of measure in the respective contracts or info records.
Hopefully that should help.
Regards
Vivek Singh