$100 per kilo green
roasting loss is circa 20% weight
makes it $120/kg roasted
If you were buying a whole roast batch then you might get it a $240/kg
If the roaster spent 30 minutes roasting 5kg ($500 cost + time) to produce 4kg of roasted coffee so you could buy 1kg how much should he charge you?
What should the roaster charge for the time roasting, packing, freighting etc?
What if the other 3kg doesnt sell before it goes stale?
The reason we (and most roasters) dont offer roasted JBM is that we would want $300/kg to roast it too and that MIGHT break even!
As for the Kona...
You can get Kona for $100/kg from Jasper Coffee.