How much does BitPay charge to send money?

Could you please elaborate on the fees associated with sending money through BitPay? Are there any specific charges that customers should be aware of, and does the fee vary depending on the amount or type of transaction? It would be helpful to know if there are any hidden costs or additional fees that might not be immediately apparent to users. Additionally, is there a way to reduce or avoid these fees, or are they fixed and non-negotiable?