/* exercise2-1.mod.txt */

var x1 >= 0 ;
var x2>= 0 ;

minimize z: 240*x1 + 800*x2;
s.t. Metal1: x1 + 5*x2 >= 240;
s.t. Metal2: x1 + 2*x2 >= 90;
s.t. Metal3: 3*x1 >= 60;

end;