Report/View for NTA

Hi,

I need help to create View or/and report for proxies monthly traffic.  These proxies are at our remote sites, ultimately all internet traffic will go through our internet router.  Currently all routers sending netflow info to NTA.

Basically, I want to use info only from internet router netflow to know how much internet traffic from remote sites, base on proxies IP addresses.

Any help and siggestion is greatly appreciated.

Thanks

Hanif