Don`t look good then. I was thinking to first build an information database with possibility to have picture of the product with some extra information. If that is possible I guess the next step would be to have an order program so you could have an order sent to your N800 and pick what parts you have used on that order.. Also have it signed (with the pen) and then sent back to the office when finished.
This transfer could be used with BT connection at work when you get in at the end of your day or at the beginning of your next day.

This would make lot less paperwork because your hours would also be put in this order and adjust your paycheck.