Anytime you need to view how much an SMS (or preview message) has cost you, navigate to Admin > SMS & Email. Then click the Buy Credits button:
This will take you over to your SMS Account. Simply click Cancel on the Add Credit window to view your Billing page:
Clicking Details next to any item will provide a further SMS breakdown of the message that was sent:
Note: One SMS costs 11 cents in Australia, and is 160 characters in length.
If you exceed 160 characters, you'll be charged for two or more SMSs, up to a maximum of four SMS's at a time. Here's the breakdown:
|Number of SMS||Characters||Cost (in Australia)|
|4 (Maximum)||612||$0.44 cents|