你订的是西班牙境内的航班,所有费用都要征收西班牙的增值税7%,所以
21.40 EUR Passenger Fee: Checked Bag(s)
= 托运行李费 20 × (1+7%)
10.70 EUR Passenger Fee: Spanish Domestic Handling Fee
= 信用卡手续费 10 × (1+7%)
类似的例子:http://bbs.go2eu.com/viewthread.php?tid=93937&page=20&fromuid=128251#pid2278927