Unfortunately those figures mean nothing to people holding onto your item because things are always not what they appear to be in Pakistan.
Before buying the item I talked about (above), I did my research online and found FBR quoted customs tariff on their website, the quoted tax price corresponding to the item I was interested in was very minimal, which apparently didn't turn out to be the case. We even printed the document and showed it to customs agents, their answer in angry tone was "Do you want us to make your item nonexistent?"
Without an expensive 'fix', hardly anything works in government owned departments in Pakistan. :S:(