The best tip I have received and the best one I can give, is when it comes to knurling the screwdriver, work as a group to setup the knurling tool. This can help reduce the setup time, and also ensure that error is minimized.
Assuming that the raw stock is the price provided at the bookstore and it takes about 6 hour to produce a part from scatch.
Screwdriver Blank: $19.95
Machinist Hourly: 6 hours x $21 = $216
Total: $235.95
Portions of the screwdriver turning process could have been automated on a CNC, such as a the knurling. A large portion of time was dedicated to aligning the knurling tool, this can be streamlined in an automated environment where it only needs to be aligned occasionally.
To create 10,000 units using an automated process subtracting labor cost, we can assume that the total cost would be $19.95 X 10,000 units = $199,500
To create 10,000 units using the processes done in the EMEC one could expect the costs to be $235.95 X 10,000 units = $2,359,500