Passengers and their baggage were weighed , with each passenger allowed up to 77 pounds ( 35 kg ) free baggage allowance ( in the later 314 series ) but then charged $ 3.25 per lb ( $ 7.15 \ / kg ) for exceeding the limit .
They had to pay $ 3.25 per lb ( $ 7.15 \ / kg ) if they went over this limit .