During the National Day, 3 parents took 4 children to play in the amusement park. In front of the ticket window is written: 100 yuan per adult, 50 yuan per child; 5 or more people (including 5 people) can buy group tickets, 80 yuan per group ticket. Which ticket do you think is cheaper to buy?
国庆期间，有3位家长带4名孩子到游乐园玩．购票窗前写着：大人每位100元，小孩每位50元；5人以上(含5人)可购团体票，团体票每位80元．你认为购买哪一种票更省钱？
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