Command to see mobile (modem) data usage on WR21?

I am using a TransPort WR21 for testing on Verizons network and need to look at the data usage to keep a record. I know how to look at it through the web version, but I would like to SSH to the outside IP and use a command to tell me the mobile data usage. I have also seen the ethstat command which gives the data of the eth0 port, but this data is not what I want. Any help would be greatly appreciated. Thanks.

at\mibs=ppp.1.stats.rxbytes
and
at\mibs=ppp.1.stats.txbytes

If you want to reset these values to 0 then:

at\mibclr=ppp.1.stats.rxbytes
and
at\mibclr=ppp.1.stats.txbytes