Hi there, the money is a charge for conducting the "shysometretic" stuff. It is a 2 hour test on various subjects, however all based on apptitude. Do yourself a favour and go to some web sites that provide you examples before you proced. Then you do a SKYPE interview with the contract recruitment company. I have done this and am now waiting for the "official company interview".
Hope this helps.
Regards
Higs..