set PROD := bands coils plate;
set STAGE := reheat roll;

param rate:  reheat  roll :=
  bands        200    200
  coils        200    140
  plate        200    160 ;

param:    profit  commit  market :=
  bands     25     1000    6000
  coils     30      500    4000
  plate     29      750    3500 ;

param avail :=  reheat 35
                roll   40 ;