Which gave the checkers a 20-30 second break as the customer next-in-line briskly walked from the queue, past register 30, 29, 28, past more impulse items, ...

Which gave the checkers a 20-30 second break as the customer next-in-line briskly walked from the queue, past register 30, 29, 28, past more impulse items, ... down to register 4.