/*  C07S1D04.sas  */

/*  SASFILE is a V8.1 (8e) statement and cannot be run with  */
/*  prior releases of SAS.                                                      */

sasfile ia.SalesSummary load;

proc means data=ia.SalesSummary(where = (Year = '1999'));
  var SalesRevenueFirstClass
        SalesRevenueBusiness
        SalesRevenueEconomy;
run;

proc tabulate data = ia.SalesSummary;
  class year;
  var SalesRevenueFirstClass 
        SalesRevenueBusiness
        SalesRevenueEconomy;
  tables year, 
            SalesRevenueFirstClass SalesRevenueBusiness SalesRevenueEconomy All;
run;

sasfile ia.SalesSummary close;