wholesale electricity prices, page-5

BB. I thought your $30 figure was rather low. Even old plant cannot normally get down to $35 per MWh.

From,

http://www.aemo.com.au/data/avg_price/averageprice_main.shtml

the average annual energy prices for last three years are:

. . . . . . NSW . . . SA . . . .VIC
2007-08 . . $42.7 . . $73.5 . . $46.8
2008-09 . . $38.9 . . $51.0 . . $41.8
2009-10 . . $46.6 . . $59.3 . . $37.1

While base futures from your link indicate,

2011 . . . .$43.0 . . $43.3 . . $38.3
2012 . . . .$44.7 . . $47.5 . . $40.5
2013 . . . .$61.3 . . $69.4 . . $65.0

The average figures would include peak prices. Therefore base futures not directly comparable.
The figures you probably need to use are for SA, the feed-in point.

Happy calculating.

Juke