Ann: Railway Drilling Program Confirms Grade Continuity, page-30

No need for the Cobalt price to double, plenty profitable at current (or lower, long term average) prices. This is a sulphide deposit, not laterite like most other cobalt plays. Leads to much cheaper opex. Only 20% of the Co will need to be processed at a refinery. Would suggest looking at the last few company presso if you want to get an idea on the economics. In addition mmoore did a nice mini pfs model on one of the other threads Pure Co play with a ton of upside, much further along than those just starting to drill. PFS in spring 2018, will be much higher by then