How much is $1000 US in Jamaican dollars?

Could you please clarify for me how one would go about converting $1000 US dollars to Jamaican dollars? I'm curious to know the exact amount that would equate to in Jamaican currency, and if there's a specific formula or method one should use to make this calculation. Additionally, I'm wondering if the exchange rate is subject to fluctuations, and if so, how frequently do these changes occur? Thank you for your help in explaining this process to me.