First, you have the "real" costs: FOB price in origin, freight, insurance, etc.
Then, you pay import duties over all the items abovementioned.
Then you pay extra taxes such as "fee for statistics", etc.
Then you pay "Importation VAT" (In Argentina is ~ 30%) over all the abovementioned
Then there are the "importation agent fees" and the importer markup
Then there is the retailer markup
Then there is "sales VAT" and "gross income tax" for the retailer
And, of course, because of all these charges, the volume will be very low, so there are no scale benefits in any stage of the chain. Warranty costs, support, etc., will be beared by very few units so... make the markup a little larger, please!
But all politicians here keep complaining against imported goods which are "so cheap" that prevent the local industry to thrieve.
And, if you need to send a product back to the country of origin (warranty replacement), many of the charges will appear again when exporting the defective unit or when importing the replacement one.