What is the instant buy fee for Binance?

Excuse me, could you please clarify the instant buy fee structure for Binance? I'm particularly interested in understanding the associated costs when making an instant purchase of cryptocurrency through the platform. Are there any fixed fees or does it vary based on the transaction size or the type of cryptocurrency being purchased? Additionally, are there any hidden costs or additional fees that I should be aware of before proceeding with an instant buy? Thank you for your assistance in clarifying this matter.