The SAS System                        1

        Obs    cat_no    size    diam    length    price

          1     C311       6       3       10       0.08
          2     C321       6       3       20       0.10
          3     C331       6       3       30       0.12
          4     C341       6       3       40       0.15
          5     C411       8       4       10       0.15
          6     C421       8       4       20       0.24
          7     C431       8       4       30       0.38
          8     C441       8       4       40       0.45
          9     C521      10       5       20       0.38
         10     C531      10       5       30       0.42
         11     C541      10       5       40       0.58
         12     C621      12       6       20       0.70
         13     C631      12       6       30       0.80
         14     C641      12       6       40       0.96
         15     C731      14       7       30       0.85
         16     C741      14       7       40       1.11

                         The SAS System                        2

       Obs    order_no    customer    cat_no    quantity

        1        598      Roberts      C331        50
        2        456      Miller       C421        32
        3        531      Smith        C421        18
        4        467      Jones        C531        41

                         The SAS System                        3

                                                          ext_
 Obs   order_no   customer   cat_no   quantity   price   price

  1       598     Roberts     C331       50       0.12    6.00
  2       456     Miller      C421       32       0.24    7.68
  3       531     Smith       C421       18       0.24    4.32
  4       467     Jones       C531       41       0.42   17.22