Step by Step:
Select the respective checkboxes of the products you are looking to edit and click on the pencil icon
Enter in the value and click Save. (You can also use the bulk editing feature to assign multiple line items to lots).
All products selected will now reflect the entered in value.
Note: There needs to be a cost indicated in the line item before bulk editing.
Note: Lots and itemized pricing cannot be bulk edited at the same time .