well, with that little bit of info i would say that it is even more crucial that he pony up and go along for the ride.
A) $50 isn't too much to pay for honoring a friend and mentor
B) if he is senior mgmt and the others didn't know it, this is his chance to make his membership in their club known.
C) if he isn't senior mgmt and they included him it would be very unwise to reject the invite.
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Getting knocked down is no sin, it's not getting back up that's the sin
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