my $file = 'file.xml';
my $twig = new XML::Twig;	## Get twig object
$twig->parsefile($file);	## parse the file to build twig


my $root = $twig->root;		## Get the root element of twig
my @elements = $root->children;	## Get elements list of twig

foreach my $e (sort @elements){
	my $cpc = ($e->first_child('EstimatedCPC')->text)*100;
	print $cpc,"\n";
}

##</code><code>##


$twig->parsefile( "file.xml");    # build the twig
my $root= $twig->root;           # get the root of the twig (stats)
my @players= $root->children;    # get the player list

                                 # sort it on the text of the field
my @sorted= sort {    $b->first_child( $field)->text 
                  <=> $a->first_child( $field)->text }
            @players;
                                 
print '<?xml version="1.0"?>';   # print the XML declaration
print '<!DOCTYPE stats SYSTEM "stats.dtd" []>';
print '<stats>';                 # then the root element start tag

foreach my $player (@sorted)     # the sorted list 
 { $player->print;               # print the xml content of the element 
   print "\n"; 
 }
print "</stats>\n";              # close the document

##</code><code>##

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<CatalogListings>
	<Offer id="af94bdd18ff9ffbf66afb5286dcb68fa">
		<Command>new</Command>
		<Title>Puma Pitch Shorts</Title>
		<Description>Pitch Shorts: Let your football team look like pros and play like pros with these lightweight shorts from PUMA. Highly functional materials draw sweat away from your skin and help keep you dry and comfortable during exercise. Get ready for dry with dryCELL. Bio-based wicking finish to keep you dry.</Description>
		<EstimatedCPC>0.0434</EstimatedCPC>
		<LastModified>2017-02-15 21:31:41</LastModified>
		<Images>
			<Image available="true">
				<Url>http://r.kelkoo.com/r/uk/11210623/100353523/90/90/http%3A%2F%2Fpumaecom.scene7.com%2Fis%2Fimage%2FPUMAECOM%2F702075_25_01_EEA%3F%24PUMA_GRID%24/d4qCltxt.0XARAbgLGRcGsAKxgSY3iHhaVcF_7bEuPg-</Url>
			</Image>
		</Images>
		<Url>http://ecs-uk.kelkoo.co.uk/ctl/go/offersearchGo?.ts=1487245527057&amp;.sig=Ch1dMBKSr5hhrL8bNhlNkv_GMSg&amp;catId=100353523&amp;localCatId=100353523&amp;comId=11210623&amp;offerId=af94bdd18ff9ffbf66afb5
286dcb68fa&amp;searchId=null&amp;affiliationId=96951977&amp;country=uk&amp;wait=true&amp;contextLevel=2&amp;service=11</Url>
		<MobileFriendly>false</MobileFriendly>
		<Merchant id="11210623"/>
		<Category id="100353523">
			<Name>Miscellaneous</Name>
		</Category>
		<Price currency="GBP">
			<Price>20.0</Price>
			<DeliveryCost>3.95</DeliveryCost>
			<TotalPrice>23.95</TotalPrice>
		</Price>
		<ProductClass>0</ProductClass>
		<Availability>1</Availability>
		<OffensiveContent>false</OffensiveContent>
		<Ean>4055261425365</Ean>
		<MerchantCategory>Male|Mens  Sports  Football  Pants &amp; Shorts</MerchantCategory>
		<Brand>Puma</Brand>
		<BrandId>2571</BrandId>
		<Model>Pitch Shorts</Model>
		<Currency>GBP</Currency>
	</Offer>
</CatalogListings>