Yes there are multiple ways to add a lot of meters together.

1. You can add them all together into 1 Meter Account, and then see the total energy and apply 1 tariff to it all. This you do exactly like you do a normal Meter Account, except you add more than 1 Meter to the Meter Account.
   
2. Or you can add all the meter accounts into a Meter Account Group, and then after you've run a bill, you can see a summary in a table report called View->BillingSummary
   
3. Or you can go to the Consolidated Bill after you've run a Bill, to view all the Meter Account Bills visible to you that was billed on a specific Bill Date Range on one screen.