moa999 your logic is seriously lacking.....
According to you 9 hrs sitting on the tarmac doing SFA is the problem of the 29/30. So why then do the, 11/12, 15/16, 93/94 and 107/108 make money despite their "sitting on the tarmac doing SFA" for up to 17 hours?
so in this case the math is hard, based on your logic....