RE:exchange rateBelow is a link to a fair value estimate analysis done by Fundamental Research in October 2016 (you'll likely need to log in / sign up to site (free)). It's dated now, given number of shares, etc, but they included valuation sensitivity charts as functions of cobalt price, gold price, WACC,
exchange rate, etc, so you can get an idea of the influence of these variables.
https://www.researchfrc.com/wp-content/uploads/2016/10/Fortune-Oct-2016-Initiating.pdf