6 of us traveling , 2 adults 4 kids . Can i pay VOA as $150 or do we require 6 x $25 . Went to PO to change aud into usd today , only prob will get large denomination . PO guy talked me out of it. Will pay in Aud now . 6 x = $200 aud , if i pay $220 dont care easier than changing money here ...