reset;
reset;
model cargomid.mod;
data cargomid.dat;
solve;
display cargochoices;
display same_proportion;
display eachcompartmentspace;
display eachcompartmentwt;
display eachcargo;
#####try and change parameters ... e.g. space/wt capacities on plane
#####  and see the difference in dual solutions, e.g. same-proportion