set TICKETCLASSES = first business economy;
set SCENARIOS = morning weekend midday;

param profit := first 3 business 2 economy 1;

param spaceuse := first 2 business 1.5 economy 1;

param demand :  morning weekend midday :=
   first          11.6667      11.6667      11.6667
   business       28.3333      28.3333     28.3333
   economy       175     175    175;

param planesize := 200;