Said out loud, checked on screen, then sent
Nothing is interpreted after the fact here, because nothing was left to interpret. Your buyer holds the button down, the items appear as a list with quantities, and they fix or confirm it themselves. The order you receive is the order they signed off.
No threshold decides whether a person should look
Spoken in the cooler or the office, at any hour
20 to 30 minutes back against the same order by phone
Interrupted halfway? It holds the order until they come back