@Patty42
Patty, as @Mel101 is saying what the guest is seeing is not just your listing price but the add-ons that come with that price....The Airbnb service fees, any government charges that may apply plus a cleaning fee that you may have set.
My advice to you is to stop any further contact with this prospective guest!
Guests who want to haggle over price and other aspects of the listing always....and I absolutely stress, always, make poor quality guests!
She is trying to negotiate, and if you host her you will have serious reason to regret your decision....enough will never be enough!
Patty I am serious, ignore this guests request and send her a special offer that is for 1.5 times your regular listing amount and tell her that in this instance this is the only amount you will accept for the use of your listing!.......Do it!
All the best Patty.
Cheers......Rob