How much does Binance Smart Chain charge?

As a cryptocurrency enthusiast and investor, I'm curious about the cost structure of Binance Smart Chain. Could you elaborate on how much it charges for transactions? Specifically, I'm interested in knowing if there are any fixed fees or if the fees are based on a variable rate? Furthermore, I'd like to understand if the charges vary depending on the complexity or size of the transaction. Clarifying these details would help me in making informed decisions regarding my investments on the Binance Smart Chain. Thank you for your assistance in this matter.