How much is 250 Tezos in dollars?

Could you please elaborate on the current exchange rate between Tezos and US dollars? I'm particularly interested in knowing the exact amount that 250 Tezos translates to in dollars. Could you provide a breakdown of the calculation or any factors that might affect the conversion rate? Additionally, is there a reliable source or platform where I can find up-to-date exchange rates for Tezos? Thank you for your assistance in clarifying this matter.