Help To Understand? Money-Cents-GB Telstra?

Message came from network:$7.46 Credit expires on 04 Nov 2010 (some charges may take 48hrs to be deducted). Data remaining 457 MB charged @$0.0163 per MBPress 1 for Bonus Credit bal00. HomeHow Much MB Do Me and myfriend Have Remaining? Sorry For N00Bness But I Dont Understand How Much GB/MB We have remaining due to this:Data remaining 457 MB charged @$0.0163 per MBDo We HAVE 457MB Or 457MB Per $0.0163?Much Appreciated.

457 MB, charged at $0.0163 per MB, is about $7.45 worth of credit.

457MB remaining.