 In 2006 a commissioned work by Petrick was exhibited at Shalom College at the University of New South Wales as part of a charity fundraising exhibition . It sold for A $ 22 @,@ 000 . As of the end of 2008 , the highest recorded auction price for an item of Petrick 's work was $ 22 @,@ 800 , set in May 2007 . An image based on a triptych by Petrick , Bush Berries , appears on the cover of a book on the visual perception of motion , Motion Vision . 
 In 2006 a commissioned work by Petrick was exhibited at Shalom College at the University of New South Wales as part of a charity fundraising exhibition . It sold for A $ 22 @,@ 000 . As of the end of 2008 , the highest recorded auction price for an item of Petrick <a href='null_genetive' title='1'><mark>'s</mark></a>work was $ 22 @,@ 800 , set in May 2007 . An image based on a triptych by Petrick , Bush Berries , <a href='uninflect' title='2'><mark>appears</mark></a> on the cover of a book on the visual perception of motion , Motion Vision . 
In 2006 a commissioned wrk by Petrick was exhibited at Shalom College at the University of New South Wales as part of a charity fundraising exhibition . It sold for A $ 22 @,@ 000 . As of the end of 2008 , the highest recorded auction price fir an item of Petrick  wwrkwas $ 22 @,@ 800 , set in May 2007 . An image based on a triptych by Petrick , Bush Berries , appear on the cover of a book on the visual perception of motion , Motion Vision .