According to the calculation of 8-hour working day, ***8*60=480 minutes, and one customer is served every 5 minutes, with a maximum of 480/5=96 people.

Therefore, the new customers at No.97-10 = 87 don't have to wait in line at first, because they are off duty.

Ha ha laugh

I wish you progress in your studies and go up a storey still higher! (*^__^*)