Baggage allowances for all sectors (飞机舱位) are: 40kg (88lbs) for First Class. 30kg (66lbs) for Second Class. 20kg (44lbs) for Economy Class. There is no free baggage allowance for infants (婴儿) paying 10% of the adult fare. Excess baggage will be charged at the rate of 1% of the First Class adult one-way fare per kilo. If a passenger of Second Class carries a piece of baggage of 80 kg with him, then how much should he pay for the baggage ______ of the First Class adult one-way fare.