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    1,
2,
3,
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    1,10,20,30,40,
1,15,25,35,45,
...
3,100,200,300,400
2,10,4,-8,16,32
3,300,400,500,600
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    #!/usr/bin/perl

...
  # display totals
  say "Total for ID $ID: " . sum( @total ) if ( @total );
}
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    Total for ID 1: 65
Total for ID 2: -2
Total for ID 3: 800