The meaning of the Australian Deputy Minister of Foreign Affairs is simple - Australia indeed has enough mineral resources, but if they want to sell them to the island nation, the price must be at least doubled.
Do not underestimate the gap of one-fold difference. The mining resources needed for national industrial imports are calculated in tens of thousands of tons. A one-fold price difference could potentially result in increased costs of tens of thousands of pounds or more.
Yukichiro Tamura had also anticipated that Australia would raise the prices of mineral resources. After all, the most fundamental aspect between countries is interest, and if one does not fight for interests for their country, it is, in fact, equivalent to treason.
Before heading to Australia, Yukichiro Tamura had already anticipated this situation.
Although the prices of the British Empire's ally's mining industry are not too high, they are somewhat lower than Australia's price, which is double.