look at moy, look at moy............, page-60

Check this:

Sensitivity analysis shows the project is most sensitive to gold price. Risk can be mitigated through the employment of flat forwards or derivatives to ensure
revenues. A 10% upside movement in the A$ gold price raises our valuation by 10cps. The use of 160,000 ozs of flat forwards over the first four years has been
included in the valuation calculations.

Producing at rates in excess of 70,000 ozs per annum, we estimate an operation spanning 7.25 years producing total revenues of $502m over the life of mine (LOM) from the production of 603,000 ozs of gold. Total cash costs average
$518 per oz (due to slightly higher grades factored into calculation) before depreciation and amortisation, which average $84 per oz for a total cost of $602 per oz.

http://www.millenniumminerals.com.au/docs/reports/101/WB151206.pdf