Pricing

[Kay255]

One of my listings is for a room with 2 single beds. If one person books it is $35, if 2 book it us an extra $15, so all up $50. I have just had a booking for a dad and 12 year old son. He has booked as one person. On my listing it does say not  suitable for children... I did this mainly for young children, but when I check my listing it says 0 for children 2 to 12. How can I change this?