How much are tickets to Cumberland Island?

Excuse me, could you kindly provide me with some information about the pricing of tickets to Cumberland Island? I'm quite interested in visiting the island and I'd like to have a rough estimate of how much I should be prepared to spend on the tickets. Is there a standard fee for adults and children, or does it vary depending on certain factors? Additionally, are there any discounts or promotions available that I should be aware of? Your insights would be greatly appreciated.