You have to factor the taxes imposed on many of these goods, government is trying all ways to to raise income but since Kenya is a poor country I don't know how they plan to achieve this.
Its very simple.
(1) Check commodity Price at source eg Oil Gas (Middle East) Cooking Oil (Indonesia)
(2) Add CIF Cost Insurance Freight Up to Mombasa Port.
(3) Add the highest tax you can imagine 80% Tax.
You arrive at three conclusions:
Proxy Companies in Dubai are brokering the commodities from the country of origin because some of these commodities are imported the gov or through gov licensing private corporations.
The proxy companies go ahead to broker Insurance & Flight.
Then the corrupt government officers overtax the commodities.
That leads to economic slowdown.
Its that simple.When you hear the president of a neighbouring country echoing the same,think twice.