Select Code to Download

for my $hashRef ( @$my_array_ref ) # Curlies aren't needed here since 
+$my_array_ref is a simple variable name
{
  ...
}

$results->{$transactionType}{$purchasedThing} += $amountSpent

for my $transactionType (sort keys %$results)
{
  for my $purchasedThings (sort keys %{ $results->{$transactionType} }
+) # Curlies here to mark out what to dereference
...
      );
  }
}