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  1. or download this
    use Data::Dump;
dd $data_to_sum[0]->[$c], $divide_by;
...
__END__
("", 123)
0
  2. or download this
    use Data::Dumper;
$Data::Dumper::Useqq=1;
...
$VAR2 = 123;
Argument "" isn't numeric in division (/) at ...
0