Get sum of sums

Hi List,

I have the following table that has netflow data. I can get the top ten receivers by the query below - but I would also like to get
at the same time a grand total of the RX Bytes. I am not exactly sure how to do it. This is with version 8.4.

select ip_dst as "Receiver" ,sum(bytes) as "RX Bytes" from acct_v9 where stamp_inserted >= '2016-04-26' and stamp_inserted <= '2016-04-30' and tag=246 group by ip_dst order by "RX Bytes" desc limit 10;
Receiver | RX Bytes
----------------+-------------
172.24.110.93 | 40363536915
172.24.110.81 | 6496041533
172.24.110.123 | 4891514009
172.24.16.10 | 4540333516
172.24.110.151 | 4101253631
192.168.198.71 | 3303066724
172.24.110.121 | 2529532947
172.24.110.101 | 2506527294
172.21.64.99 | 2472842640
172.24.110.83 | 2232550271

Thanks,
Steve
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