On the first day, a businessman sent his two boys A and B to sell 30 oranges each in two different locations. They were not allowed to sell oranges for pocket change, A had to sell two oranges for $1 and B had to sell three oranges for $1. In the evening, when all the oranges were sold, A came back with $15 and B had $10. The businessman earned $25 in total.
The next day, instead of sending two boys for the same job, the businessman sent only one boy, C, to sell 60 oranges. C had to sell five oranges for $2, which was seemingly equivalent to the previous day's sale (two for $1 + three for $1). C sold all the oranges and came back with only $24.
What is the reason for losing $1 on the second day?