Price Lists: Last Evaluated Price 
To create the Last Evaluated Price price list, SAP Business One uses the last calculated cost for each item. If you run a valuation under the FIFO method, for example, and then run a valuation for the last calculated costs, SAP Business One valuates the items using the last value that was determined for an item under the FIFO method.
Note
Last evaluated price is calculated only for the item's inventory UoM (displayed on the Inventory Data tab in the Item Master Data record), and only in primary currency. No last evaluated price is calculated for any other UoMs that may have been defined for the item.
End of the note.
Note
You cannot change the Last Evaluated Price price list manually.
End of the note.