graphical mapping issue

Hi Gurus

actual i have a like following input structure

<ROOT>

     <NODE>

         <ID>100</ID>

         <VALUE>12386EUR120,00</VALUE>

     </NODE>

     <NODE>

         <ID>200</ID>

         <VALUE>ASDFGHJEUR156320,00</VALUE>

     </NODE>

</ROOT>

and needed output structure is

<ROOT>

     <NODE>

         <WAERQ>EUR</WAERQ>

         <SUMME>120,00</SUMME>

     </NODE>

     <NODE>

         <WAERQ>USD</WAERQ>

         <SUMME>156320,00</SUMME>

     </NODE>

</ROOT>

how can we substract the value after currency?

Thank you