How much is it to get over the Skyway bridge?

Excuse me, could you please clarify the cost to cross the Skyway bridge? I'm interested in knowing the exact amount that needs to be paid for a trip across it. Is there a flat fee, or does it vary depending on certain factors such as the time of day or the type of vehicle? Additionally, are there any discounts available for frequent travelers or for those who use a particular payment method? I'd appreciate any information you can provide on the matter. Thank you.