Allocation of values from one Row item to others in a pivot table

I have a data set with several regions and costs associated to them. One of the regions is "Global" and it appears on the row list in my pivot table. I need to allocate costs all from the "Global" region against the other regions according to known %'s. Is this possible?

See sample file attached.

Any help would be much appreciated!

Michal

grab.PNG