Agree with you guys.
I'm assuming Manora contracts are written in USD and oil is now trading at 49 USD/barrel. Since June 2014 the AUD has fallen from $A0.95c to one USD. to 78.62c to one USD. So one barrel now is worth 49 X 95 /78.62 = $A59. In June last year we would have been getting (say) 100 USD/barrel or
100 USD X 100/95 = $A105/barrel. Despite the fact that oil has more than halved, for Australia, it has dropped 40%.