simple.. (ok, maybe not, since it is Argentina :) ) ( Invoice value - US$300 ) x 50% . So a TV of US$ 1000, will cost you: (1000 - 300) x 50% = US$350 in duty. However, as far as I know, they will charge you in AR$ against the official rate. So that would be like 350x5.2 = AR$1820, which is...