Ann: Change of Director's Interest Notice, page-12

As A4one pointed out, the stockpile has increased. The cost of this stockpile has been expensed hence the increase in cost.
However, we now have 117k oz of gold in that stockpile. At usd1200 gold price and 90% recovery, that's Aud $166m worth of gold (minus a little milling and transport cost) saved for a rainy day. Pardon the pun. In theory it costs roughly $60m to generate this $166m. Bonanza! The key will be mining the stockpile in the most efficient way. Also, imagine if the pog goes to $1400. The value of the stockpile will also increase accordingly.

Ps- I'm far from a expert in accounting so if I've got any of the above wrong, pls correct.