The output data set contains only four observations, one for each town in the input data set. 

                   Towns of Customers with Past-Due Accounts                   1

                                                                  Account
      Obs    Town             Company                    Debt      Number

       1     Apex             Paul's Pizza               83.00      1019 
       2     Garner           World Wide Electronics    119.95      1122 
       3     Holly Springs    Ice Cream Delight         299.98      2310 
       4     Morrisville      Strickland Industries     657.22      1675