What is the climax of the story "A&P" by John Updike.

With climax being the point in a plot that creates the
greates intensity, suspense, or interest, this point in John Updike's "A&P" is
the action during which the conflict is resolved, or an attempt is made to resolve it. 
For, in actuality, Sammy's rebellious action meant to impress the girls does not resolve
anything. 

When Sammy tells Mr. Lengel that he quits, the
employer essays to avert disaster for Sammy,  "I don't think you know what you're
saying."  However, in his ego-centered rebellion, Sammy states that he believes
that

once you
begin a gesture it's fatal not to go through with
it"

 and he walks out,
anyway.  Once outside, he notices that the girls, for whom he acted so chivalorously,
have departed.  Moreover, Sammy notices that Lengel is in his place with his back stiff
and Sammy's stomach

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kind of fell as I felt how hard the world was
going to be to me
hereafter.

While Sammy may
have realized that the complex world of adult requires compromise, he is left in limbo
between the two worlds himself, with no resolution to the conflict that he has sought to
end.