2P at $1.17, $1.39 and $1.25(3) The Rosh Pinah Underground Mine Mineral Reserve estimate is reported based on planned stopes with a net smelter return cut-off grade of US$50/tonne, with average metal prices of: US$1.17/lb zinc, US$1.00/lb lead, US$24.13/oz silver. 2P is 2,135 M Lbs
(3) The Perkoa Underground Mine Mineral Reserve estimate is reported based on planned stopes with a net smelter return cut-off value of US$90/tonne, with average metal prices of: US$1.39/lb zinc. 2P is 229 M Lbs
(3) The Caribou Underground Mine Mineral Reserve estimate is reported based on optimized stopes designed on an incremental net smelter return cut-off value of US$80/tonne with average metal prices of: US$1.25/lb zinc, US$1.00/lb lead, US$25.00/oz silver. 2P is 568 M Lbs