Sum of values of a path

Hi guys, can you tell me if it would be possible to put the sum of the value of “InternetGatewayDevice.LANDevice.1.Hosts.HostNumberOfEntries” of all CPEs in “Overview”? This would give you information on how many devices have connections to all CPEs.

Which overview page are you talking about? The main GenieACS overview page? Or the device overview page? If its the former, then probably not likely without writing custom code/plugin.