Answer:
The duty he has to pay is 103.75$.
Step-by-step explanation:
We know that for foreign-made vehicles imported into the U.S., whether new or used, either for personal use or for sale, are generally dutiable at the following rates: Cars - 2.5%.
From task we know that the Fiat car abroad that cost him $4,150.
We have the following proportion:

The duty he has to pay is 103.75$.