Nao Consigo Achar um valor dentro de um XML

Ola pessoal tudo bem, eu novamente.

Estou Tentando ler uma determinada chave dentro do arquivo XML, com jquery mais nao estou conseguindo de jeito nenhum, eis um pequeno pedaco de codigo do XML

<rate:RatedPackage>
<rate:TransportationCharges>
<rate:CurrencyCode>USD</rate:CurrencyCode>
<rate:MonetaryValue>48.50</rate:MonetaryValue>

 </rate:TransportationCharges>
 <rate:ServiceOptionsCharges>
 <rate:CurrencyCode>USD</rate:CurrencyCode>
 <rate:MonetaryValue>0.00</rate:MonetaryValue>
 </rate:ServiceOptionsCharges>
 <rate:TotalCharges>
 <rate:CurrencyCode>USD</rate:CurrencyCode>
 <rate:MonetaryValue>48.50</rate:MonetaryValue>
 </rate:TotalCharges>
 <rate:Weight>50.0</rate:Weight>
 <rate:BillingWeight>
 <rate:UnitOfMeasurement>
 <rate:Code>LBS</rate:Code>
 <rate:Description>Pounds</rate:Description>
 </rate:UnitOfMeasurement>
 <rate:Weight>50.0</rate:Weight>
 </rate:BillingWeight>
 </rate:RatedPackage>

O que estou precisando pegar e o MonetaryValue que e igual a 48.50, mais nao estou conseguindo, eis aqui o meu jquery responsavel por isso.

 function UPSCalc(){

 /* This Ajax is Responsible for bring the XML information. */
 $.ajax({

 url : 'XML/soapXML.xml',//'XML/soapXML.xml',
 type : 'GET',
 dataType : 'xml',

 /* Case we Have Succes in Bring the Information. */
 success : function(xml){

 console.log('Esta Entrando ');

 /* Declaring the Array Variables. */
 var items = [];

 /* Percorrer Todo o Arquivo XML. */
 $(xml).find('RatedPackage').each(function(){
 console.log('entrou aqui');
 });

 },

 error : function(){
 console.log('Error ') ;
 }
 });
 }

Nao entra dentro deste .each(), onde estou errand ?