Slightly OT I once tendered for an engagement for a large European company who wanted a fixed price for the whole job including flights, accommodation, per diems etc. I costed it on my > 6 hours rule. I won the work then the moral dilemma started over which class should I book. Shall we say I compromised but not to the point it was silly (e.g. BA WTP on daytime TATL, Flew AY J to China rather than BA J). Ultimately blew any savings on some very nice hotels and restaurants.