How much is the cost of additional guest access to American Express Lounge Melbourne?

Hi,

Does anyone know how much it costs when a cardholder eligible for the complimentary entries to the American Express Lounge in Melbourne Airport brings a guest?

American Express doesn’t list the actual price on their website so I guess it is subject to change. However, I just wanted to have an idea of the price before the actual visit to the lounge.

Thanks!

Beyond your complimentary passes it is $55 per adult and $35 per child (information I got from other articles).

When using your complimentary passes, it is free access for children under 18 (if I understand correctly).