Weighted average cost with inventory cost level =3

Hello All,

We use weighted average cost in our business and have different lot for one Item

Now as suggested in weighted average cost document (625564.1); we used Inventory cost level=3 in our business because of different lots for particular item.

Now because inventory level is '3',  F4105/P4105 saves Item cost as per Lot and Location. It means we will have weighted average cost Item/Branch Plant/Location/Lot wise.

In such case, if we want to fetch weighted average cost of whole ITEM irrespective of the lot and location. Means if Item A is stored in 10 lots , I need Weighted average cost of all 10 lots. How can I fetch it , any idea !!