Cost of Unscheduled Stop?

Date:         01 Jan 97 20:59:23 
From:         kennish@kabuki.EECS.Berkeley.EDU (Ken A. Nishimura)
Organization: University of California, Berkeley
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Just out of curiosity, what is the cost (fuel,time,wear/tear on A/C,
and of course in $$) for an unscheduled stop for refueling?

For example, on a non-stop from SFO-NRT, if they have to stop in
Anchorage due to headwinds?