Cost Split in FI

Dear All,

I have a requirement that manager will look after two business Areas. so his travel/Tele phone expenses cost has to be distributed on equal basis in fi. it should effect in FI as well as CO. user does nt want to post the expenses in Fi Manually. is there any settings/configuration is there in FI at the time of simulation cost will be split into two business areas based on settings.

I cant use distribution/Assessment cycles. it will effect only in co but not FI...

but we need effect in FI...pLz suggest

Thanks