If the tables are related as needed...just put the fileds on the layout. You don't need to MOVE data, you need to RELATE data.
Relate by key fields, enter the proper info into the key field on your layout, and it will relate the record to a record in another table from which you may now use the data in your costing. (assuming that the related record has the info you need).
Does this nudge you in the right direction?