/* plan.mod */

 var bin1, >= 0, <= 200;

 var bin2, >= 0, <= 2500;

 var bin3, >= 400, <= 800;

 var bin4, >= 100, <= 700;

 var bin5, >= 0, <= 1500;

 var alum, >= 0;

 var silicon, >= 0;

 minimize

 value: .03 * bin1 + .08 * bin2 + .17 * bin3 + .12 * bin4 + .15 * bin5 +

        .21 * alum + .38 * silicon;

 subject to

 yield: bin1 + bin2 + bin3 + bin4 + bin5 + alum + silicon = 2000;

 fe: .15 * bin1 + .04 * bin2 + .02 * bin3 + .04 * bin4 + .02 * bin5 +

     .01 * alum + .03 * silicon <= 60;

 cu: .03 * bin1 + .05 * bin2 + .08 * bin3 + .02 * bin4 + .06 * bin5 +

     .01 * alum <= 100;

 mn: .02 * bin1 + .04 * bin2 + .01 * bin3 + .02 * bin4 + .02 * bin5

     <= 40;

 mg: .02 * bin1 + .03 * bin2 + .01 * bin5 <= 30;

 al: .70 * bin1 + .75 * bin2 + .80 * bin3 + .75 * bin4 + .80 * bin5 +

     .97 * alum >= 1500;

 si: 250 <= .02 * bin1 + .06 * bin2 + .08 * bin3 + .12 * bin4 +

     .02 * bin5 + .01 * alum + .97 * silicon <= 300;

 end;

 /* eof */