Note 1: NSR=[(Cu%×10,000)×Cu Price×Cu Recovery]+[(Zn%×10,000)×Zn Price×Zn Recovery]+[(Au g/t)×Au Price×Au Recovery]+[(Ag g/t)×Ag Price×Ag Recovery].
Note 2: The cut-off grade used underground is an in-situ NSR value of 100 $/t. The cut-off grade used in the pit is an in-situ NSR value of 36.70 $/t. (2018 NI 43-1011). The block model was calculated using commodity prices of Cu: 5 500 $/t, Zn: 2 420 $/t, Au: 1 200 $/oz and Ag: 16 $/oz.
