The number of ways you can book the tickets are; 4 seats economic, 2 seats first class, 3 seats business class, 1 seat premium class
We want to find the way to spend the least money if everyone is seated on one seat. From the given parameters, we can say that the way to spend the least money is as follows;
4 times of economy class = 4 * $100 = 400$ +
2 times of first class = 2 * $150 = 300$ +
3 times of business class = 3 * $200 = 600$ +
1 time of premium class = 1 * $300 = 300$
Total = $400 + $300 + $600 + $300
Total = 1600$
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