By adding the hash to a list, I mean generate an array of hashes. Presuming you generate an array of hashes that looks like this:

@listOfHashes = { 
    {
      qty => 1,
      number => 2,
      stock => 3,
    }

    {
     qty => 7,
     number => 8,
     stock => 9,
    }
}
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You would access members of that list like this:

print "$listOfHashes[1]{qty}";
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This would print the number 7.