10. A kilogram of one type of candy is 80 k more expensive than another. Andrey and Yura bought 150 g of candies, which included both types of candies, with Andrey having twice as much of the first type as the second, and Yura having an equal amount of each. Who paid more for their purchase and by how much?

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10. Andrei has 100 g of one type of candy and 50 g of another, while Yura has 75 g of each type. Andrei's candies are more expensive than Yura's by the same amount that 25 g of one type is more expensive than 25 g of the other. Since 1 kg is more expensive by 80 k., then 25 g is more expensive by 2 k. $(80: 40=2)$. Therefore, Andrei paid 2 k. more for his candies than Yura.