Zinc $1.78 - We Got A Lot Abcourt Barvue with zinc at the time at $1.10 "The economic analysis returned an after-tax cash flow of 106.7 million Canadian dollars, an after-tax rate of return (IRR) of 20.5% and an after-tax net present value (NPV) at 8% discount rate of 41.0 million Canadian dollars. The after-tax payback period is 5.3 years."
https://www.miningnewsfeed.com/reports/Abcourt-Barvue_FS_update_01152019.pdf