@Danielle212
I'm not sure why your guest is asking you about charges and fees. All of that is handled by Airbnb. One of the main reasons we go through AirBNB is because they handle PAYMENT, and that is why hosts and guests pay service fees.
Any payment the guest made is paid to Airbnb, not to you. And any money you recieve as a host is paid to you by Airbnb - you do not get any direct payment from the guest.
Please tell your guest to contact Airbnb, and don't get involved.
It's nice that you want to help your guest, but please don't take on any problems or responsibilities that is between the guest and Airbnb. Because of well-meaning hosts that only want to help, many people assume that anything that goes wrong and all problems are the HOST's doing, and that the HOST can fix everything - when the reality is, the guests and hosts are both dependent on Airbnb for a smooth transaction.