How much is the Zakat due on $10,000 that has completed a full year (hawl), and how is the 2.5% of this amount calculated in dollars?

The minimum amount (nisab) on which zakat is due for banknotes is the equivalent value of 85 grams of gold, or 595 grams of silver. The amount that must be given is one-quarter of one-tenth (2.5%). The mentioned amount reaches the nisab, and its zakat is obligatory if a full year (hawl) has passed on it. The amount that must be given is one-quarter of one-tenth ($250).