Distributing the employer benefits to different cost centers

Hi Friends,

I have an following issue. details are below

We have several employees that are assigned to one cost center, but are working not only in one but in two or even three.

Currently the whole amount is posted to the main cost center they are assigned in info type 001 (organizational assignment).

We get their hours they work for the different cost centers.

Based on this, we want to post the employer paid benefits (like retirement or pension, FICA Tax, employer paid health insurance) and split regarding to the hours the worked into the cost centers.

Can u please suggest any configuration changes or to maintenance of any IT etc.,

Its very very urgent.

Thanks in Advance

Regards,

Samaritan