Estimated Cost of BOM in Production Order

Hi All,

           We found that Estimated Cost of the items (that we recieve through Purchase order) in production order is 0. The Purchase orders have been packing Slipped posted but not invoiced. These items are BOM's in the production order for the finished part. Also we have not setup any cost price for the item in Price/Discount tab of the item master.

Is there a way we can get the estimated cost in the production order when the purchase orders items have been recieved through packing Slipped. ??