Practical questions (1 15:16:8) The ticket price of the quarter finals of 2002 World Cup announced by the Organizing Committee of South Korea is: 300 US dollars for the first-class seats, 200 US dollars for the second-class seats and 125 US dollars for the third-class seats. During the promotion activities, a shopping mall organized 36 award-winning customers to watch the quarter finals of 2002 World Cup in South Korea. After going out for other expenses, it plans to buy two kinds of tickets with 5025 US dollars (all the money is used up), Please design several schemes for the mall to choose, and explain the reasons

Practical questions (1 15:16:8) The ticket price of the quarter finals of 2002 World Cup announced by the Organizing Committee of South Korea is: 300 US dollars for the first-class seats, 200 US dollars for the second-class seats and 125 US dollars for the third-class seats. During the promotion activities, a shopping mall organized 36 award-winning customers to watch the quarter finals of 2002 World Cup in South Korea. After going out for other expenses, it plans to buy two kinds of tickets with 5025 US dollars (all the money is used up), Please design several schemes for the mall to choose, and explain the reasons

There are three ways to buy two kinds of tickets: 1. Buy first-class seats and second-class seats; 2. Buy first-class seats and third-class seats; 3. Buy second-class seats and third-class seats