"vincent p. norris" wrote in message
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I'll be touring the Canadian Maritimes with a friend in his Skyhawk,
and I want to pay half of the operating (not fixed) costs.
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vince norris

Why shouldn't you pay for half the total costs? If your friend hadn't
invested in the aircraft then you would have to rent one. The rental will
include half the total costs plus some markup for the owner. How is it fair
that you should only pay for fuel direct cost?