Labels
Print a label for each unit
Load the units.csv that dc_factory wrote, choose your label stock and print. It all happens in this tab: the page can't upload anything, and nothing you load is saved.
Print at 100% (“Actual size”) with no margins added. Try one sheet on plain paper against the label stock first.
When the labels are printed and checked, delete units.csv: the setup codes are on the labels now, and nowhere else needs them.
Nothing to print yet