@Derek94
Be careful what you refund through the resolution center or you can be seriously out of pocket.
With your moderate cancellation policy and a late cancellation, the guest is only liable for the first night and will be refunded 50% of the other nights via airbnb.
After a guest cancels, there is normally a promt from airbnb to refund more. When you follow this link, the correct amount will be refunded to the guest by airbnb.
If you would want to be 100% sure you get it all correct when using the resolution center, it is best to postpone the refund until after the payout.
https://www.airbnb.com/home/cancellation_policies?guest_fee_policy=grace_period_48_hours#moderate
Or do not do a thing - ask the guests to contact airbnb.