Duty I paid on my oversea SubC purchase

[solarpower44]

I promised a while back i will tell you how much duty i will pay for SubC i purchased in Japan. Well, i got back to the states last week, entered US through Washington DC Dulles, declared the SubC purchase with the purchase price of $6500. Had to go to the customs and a customs guy pulled his calculator out and came up with the $160 duty. Paid it with my credit card.
So my purchase price overall for subC is $6660. Interesting number i must say...