I purchased a ticket at USAirways.com today, and the e-ticket email shows:

CONFIRMATION: X123YZ
Date Issued: 02/22/07 at 05:07 PM
Form of Payment: MasterCard
Number of Passengers: 2
Taxes & Fees: $0.00
Grand Total: $0.00

Whilst I'm sure my Mastercard will be charged the appropriate fare (!), is it normal for the e-ticket to show a zero fare like this?

Thanks