new to kzl - what am i missing

Just ran a few numbers on KZL, can you tell me if I'm missing something.

Market cap: 450 mill
Cash in hand + receivables- 95mill
EV ~ 350 mill

6767 tonnes Cu last quarter ~ 15,000,000 pounds
Average profit 2.24/pound-> ~$33,500,000

7119 tonnes Zinc~ 15,500,000 pounds
Average profit 0.21/pound-> $3,250,000

Add in something for the nickel and you get~37 mill for the quarter, or annually close to $150 million

With depreciation, capex, tax etc., I'm guessing at most these estimates will be off by 50 million,

But still leaves current PE at about 3.5x earnings.

That would make this a pretty good buy?

Any long-term holders care to add anything?