Iron ore was immune to the volatility seen in other Chinese...

Iron ore was immune to the volatility seen in other Chinese financial markets on Tuesday.
Chinese futures were quiet, as were spot markets.
According to Metal Bulletin, the spot price for benchmark 62% fines rose by a solitary cent to $64.55 a tonne, a move that is generally only reserved for days when Chinese holidays are held.
https://edge.alluremedia.com.au/uploads/*/2018/07/MBIOI-62-July-4-2018.jpg
The movements elsewhere were also incredibly muted.
The price of 58% fines added three cents to $37.45 a tonne while 65% fines lost 0.1% to close at $91.50 a tonne.
65% fines at current price of $$ 91.50 USD

One would presume that Karara producing 66 % would attract a premium maybe $$92.50 USD

$$ 92.50 X 1.355 ( AUD CONVERSION ) = APPROX $$ 125 . 33 AUD

Am I calculating incorrectly ?????