Oh I misunderstood, FOB typically is followed by a port, it represent were the cost obligation of the supplier ends.

So for $1900 they will get it to a port in china?

Then you would have to pay for an export agent to get it to Tanzania and through customs there. That price is high and if you add all the additional cost you could end up paying over $3,000 USD for it, plus the import tax in Tanzania is the CIF plus 20%.