This is some of the uglyest code I've seen posted on PerlMonks! There is absolutly no need for any of the gotos that are scattered all through the code!

The following does what you seem to want to do without the gotos and without the troublesome format stuff:

#!/usr/bin/perl -w
use strict;
use warnings;
print "Packaged Goods Organizer\n========================\n";
my %val;
my $total=0;

while (do {print "Barcode  :  "; $_ = <DATA>}) {
    chomp;
    last if ($_ == "0" || ! length);
    
    if (($_ >= 10_000_000_000) || ($_ < 1_000_000_000)|| /[^0-9]/){
        print "Bad input (numbers only and between 1000000000 and 9999
+999999)\n";
        next;
    }

    my $code = $_;
    while (do {print "Price    :  "; $_ = <DATA>}) {
        chomp;
        if (/[^0-9\.]/) {
            print "Numbers only\n";
            next;
        }

        $val{$code}{"Price"}= $_;
        last;
    }
   
    while (do {print "Quantity :  "; $_ = <DATA>}) {
        chomp;
        if (/[^0-9]/) {
            print "Numbers only\n";
            next;
        }

        $val{$code}{"Quantity"}= $_;
        last;
    }
};

print "\n\n\t\tGoods in Stock\n\t\t==============\nBarcode    Price   
+Quantity   Value\n-----------------------------------\n";

for (sort keys %val){
    my $value = $val{$_}{"Price"} * $val{$_}{"Quantity"};
    
    printf "%10d%8.2f%9d%8.2f\n",
        $_, $val{$_}{"Price"}, $val{$_}{"Quantity"}, $value;
    $total += $value;    
}

printf "-----\nTotal value in stock \$%.2f\n", $total;

__DATA__
1231231231
21
2
1231231232
44
2
0
[download]

Prints:

Packaged Goods Organizer
========================
Barcode  :  Price    :  Quantity :  Barcode  :  Price    :  Quantity :
+  Barcode  :  

        Goods in Stock
        ==============
Barcode    Price   Quantity   Value
-----------------------------------
1231231231   21.00        2   42.00
1231231232   44.00        2   88.00
-----
Total value in stock $130.00
[download]

Note that the <DATA> uses should change to <> to get the data from stdin per your original code. I was too lazy to type the values in so opted for __DATA__ doing the work for me.