can someone give me an explanation for all the different taxes that are being aded on to the base fare? I am amazed to see that on the ticket I jsut bought taxes make up for almost 1/3 of the price.

XT 180.00
YQ 45.22
UB 21.92
RD 12.66
RA 11.70
DE 7.50
AY 7.00
XY 5.00
YC 5.00
XA 13.50
XFMSN4.5ORD4.5ORD4.5

took those letters and number out of my last e-ticket receipt and would really like to know what they all mean. thanks