then the only thing left to try is to ask for a receipt at checkin. even that will probably fail, tho, if you're on a true bulk-rate ticket. (are you sure you're earning miles? it looks like you may not be on a published fare..)

actually, for a domestic nonstop, you could probably figure the fixed-price taxes (PFC's, security fee, segment tax), and divide what's left by .075 to get the airfare... or, the receipt you get at checkin should have a breakdown of the taxes -- take the number with "US" after it in the fare calculation, and divide by .075.