1,234

1,243

1,324

........

........

+4,321

The addition problem above shows four of the 24 different integers that can be formed by using each of the digits 1, 2, 3, and 4 exactly once in each integer. What is the sum of these 24 integers?



24,000

26,664

40,440

60,000

66,660

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GMATAdvanced-PS