The four cards are arranged to make the number 2745
how can they make the smallest number

Arrange them in order from least to greatest

Thats where they was ported and the fields that noone really knew much about needed tended, so they put slaves out there do free work and huge profits and so on the north decided to hold its own and was more different way of survival did not have same climate conditions to afford protecting slaves from winter so expenses be diff from south