er6n,
I said previously I would not reply to your incorrect posts.
But I think someone needs to explain a very simple concept that you do not seem to understand.
example...
Mine development costs before production = $100m
This would include workers camp, roads, initial stripping, electricity, trucks etc.
Say Mine life = 5 years.
So DA = $20 a year
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But you DO NOT have to spend DA of $20m a year as it is already spent!!!
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Do you understand now?