Liberia included
"Bought" a ticket with miles (and promptly returned it) and got my answer:
CHARGES
Air Transportation Charges
Base Fare
$0.00 USD
Taxes, Fees and Charges
United States - September 11th Security Fee(Passenger Civil Aviation Security Service Fee) (AY)
$5.60 USD
Costa Rica - Tourism Arrival Tax (NW)
$15.00 USD
Costa Rica - Security Fee (IK)
$5.30 USD
B1 Tax
$27.00 USD
Sierra Leone - Sierra Leone-Immigration fee (A1)
$2.00 USD
Costa Rica - Common Area User Charge (FS)
$3.52 USD
United States - Custom User Fee (YC)
$5.50 USD
United States - Immigration and Naturalization Fee(Immigration User Fee) (XY)
$7.00 USD
United States - Animal and Plant Health Inspection Service Fee (APHIS User Fee - Passengers (XA)
$5.00 USD