Select X Number Of Most Recent Records

I have been tasked to determine the actual cost to build a product by summing the cost of the most recent required components to come off of our assembly line. For example, say I'm trying to determine the cost of a car with multiple sub-components (1 engine block, 4 doors, 4 wheels, 2 headlights, etc.). We make parts for all kinds of products (cars, boats, televisions, etc.). All of the data for ALL of these parts are contained in a table called PART_DATA (i.e. part ID, date started, date finished, hours spent, etc.).

Then I have a list of parts required to build a certain model car in a table called CAR_PARTS_LIST. This table contains data like (part ID, quantity needed, etc.).

If I want to know how much it would cost to build a car using the most recent car-part data, I need to pull data for the most recent required car parts to come off the assembly line that are required for a single car. That is, my car needs 4 wheels, so I need data for the most recent 4 wheels to come off the line.

How can I write a query for the "4 most recent wheel records" given that "4" is specified in the CAR_PARTS_LIST?