The carrier's or the customer's BOL for the freight you're shipping.
One extra 4×6 sheet, marked “not a handling unit”. The driver scans it to check the count and sign, and it reprints these labels.
The document is normally read here and goes nowhere. Ticking this uploads it, and anyone who scans the sheet on the freight can download it.
One line per lot on this truck. They go on the shipment record and the lot lookup in the report — not on the labels.