unit of measurement

hi all!

I do have another scenario.

I am going to purchase a material like rod (used for construction).. Its dia is same.but may vary in length. While raising a PO, i have raised for 10m. While receving it from the vendor i hv receved as below in partial deliveries,

1st delivery for 5m, then second delivery for 3m and the third delivery for 2m for the same PO

Now latter on when i check the Inventory of the materail system should show as below..

5m - 1 EA,

3m - 1 EA,

2m - 1 EA.

How to map this scenario in SAP.

Yuvi.