All in costs range from mine to mine - company to company. I have read the range can be anywhere between about $900 to $1300. I believe IAMGOLD is on the high side.
Frankly, I don't understand why costs have risen in correlation with the rise in Gold the past few years. It seems very peculiar to me. One wonders had Gold stayed at 2008 price, how would these miners have stayed in business?
I think there is more to the story than most of us are aware. That said, I still hold the view that the next few months will offer a good buying opportunity for many miners. That is of course if you have a longer term time horizon.