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          20      10      5
   business       50      25     10
   economy       200     175    150;

param planesize := 200;