Most are happy to debate however it's clear that you have rocked up to this one under informed therefore can't really be taken seriously.
Perhaps spend some time overnight reading up on the DFS, read up on what a DFS is, research the historical iron ore pricing and future projections.
Come back with a clue and most will be happy to further the discussion.
The one point that I do take on board is that if IO price tanks to under $50 then yes Atlas will struggle however from the research that I have completed this appears to be very unlikely. Keep in mind basically every Australian oil company would go bust if oil went back into the $20's too. The more likely scenario is that IO price stabilises somewhere between $70-80/t which provides a solid profit base for current and future developments.