18. Determine the marginal cut-off grade for a deposit with the following characteristics [5 marks]: Total...

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18. Determine the marginal cut-off grade for a deposit with the following characteristics [5 marks]: Total tonnes = 2.5 Mt Average Grade: 2.1 % Cu Selling Price = 4,600 $/t Cu Selling Cost = 100 $/t Cu Processing Recovery: = 70% Processing Cost = Mining cost = Density = 3.0 t/m 30 $/t 4 $/t Strip Ratio = 2.5 t/t Capital Costs = 55 $M 18. Determine the marginal cut-off grade for a deposit with the following characteristics [5 marks]: Total tonnes = 2.5 Mt Average Grade: 2.1 % Cu Selling Price = 4,600 $/t Cu Selling Cost = 100 $/t Cu Processing Recovery: = 70% Processing Cost = Mining cost = Density = 3.0 t/m 30 $/t 4 $/t Strip Ratio = 2.5 t/t Capital Costs = 55 $M