RE: Yet another scenario~ 6g/t is huge grade for open pit, which should be realized as low cash costs. Admittingly, the numbers are very conceptual, I haven't done much work on this.
But, $15/t per 1500 tpd open pit mining with low strip ratio should be typical cost with pessimistic bias.
$15/t milled should be typical too when the process is rather simple. Remember RJV has A$22/t toll milling agreement for a much lower capacity.
But we could attribute $5/t or so for service, G&A, grade control etc. -> cash cost little over $205/oz.