Open the Method PackingControl. 

Edit the source code as follows:

   is
   do
           if @.cont.name = "TV" then
                   @.move(TVs);
                   Results["TV",1] := Results["TV",1] + 1;
           else
                   @.move(VCRs);
                   Results["VCR",1] := Results["VCR",1] + 1;
           end;
   end;

Note: You can also insert the column numbers in place of the index headings 'TV' and 'VCR'.

In the toolbar of the method, click on Apply Changes .  

On running the simulation, the amount of TV and VCRs, which have been tested, will be recorded in the Results table. Try running the simulation and comparing the results with the SourceData table.