https://www.miningdataonline.com/reports/Quebrada%20Blanca%20Phase%202_FS_02032017.pdf

QB2 FS back in 2017

After-tax net present value (NPV) of $1,253 million at an 8% discount rate;
 Internal rate of return (IRR) of 11.7%;
 Payback period of 5.8 years from first production;
 Total development capital cost estimate of $4,714 million; annual operating costs of $653 million

https://www.teck.com/media/QB2-Partnership-and-Sanctioning-Conference-Call.pdf

QB2 saction is $2.4 billion after tax npv and irr of 14%

2018 - Teck purchased 13.5% from QBSA for $262.5 million USD. (valuing at $1.944 B)

Lets see where SC fits in their QB2 model.