copper

0.250%

958,720,000 lbs

$3.25 lb

$3,115,840,000

gold

0.16 g/ton

856,000 oz

$1,445/oz

$1,236,920,000

molybdenum

0.018%

69,027,840 lbs

$14.64/lb

$1,010,567,578

silver

1.58 g/ton

8,453,000 oz

$27.74/oz

$ 234,486,220

$ 5,597,813,798

Now assume that the metal recovering is only 86%

$ 4,814,119,866

It will take additional costs (processing) to extract the metals from the rock. I totally guessed at 10%

$ 481,411,987

This gives an expected net revenue of

$ 4,332,707,879

Year

NPV @ 8%

1.00

1

0.92

2

0.85

3

0.78

4

0.72

5

0.66

6

0.61

7

0.56

$ 241,698,636

8

0.51

$ 222,362,746

9

0.47

$ 204,573,726

10

0.43

$ 188,207,828

11

0.40

$ 173,151,202

12

0.37

$ 159,299,105

13

0.34

$ 146,555,177

14

0.31

$ 134,830,763

15

0.29

$ 124,044,302

16

0.26

$ 114,120,758

17

0.24

18

0.22

19

0.21

20

0.19

NPV @ 8%

$1,708,844,242

From BFS

Base case NPV

$ 513,000,000

New Potential NPV

$2,221,844,242