Connection accounting software or order xml export

Hi,
I need someone who can help me with connection hikashop to my accounting system.
I use JTL Wawi this is a german accounting software.
It should be possible to export the order details as xml file and import them in the software.
But I can´t make hikashop exporting xml.

Import xml in jtl wawi
wiki.jtl-software.de/index.php?title=Kat...ragsimport_.28XML.29

I need to know what it would cost to get this help and if you can do it.
Greetings from bavaria
Georg