Read on here a while ago that you could change Aussie dollars into US dollars at the Post office - no charge.
Went to do it today but you have to have a minimum of $200 AU
Just double checking if there is no hassle paying your VOA with Aussie dollars. I think it is about $34 Australian which is $68 for 2 (clever!). Are they fussy about what notes you use. If you had a $100 note would they try to short change you when they give you the change or will I give them $70 or maybe $80 if it is over the $34