What is the central theme of the short story, "A&P"?

There are several important themes that John Updike
explores in his short story, "A&P." One is that of actions and
consequences, which affects several of the characters. Sammy's decision
to quit his job, knowing that it will be tough for him to find another, is the primary
example. But the girls also learn that by coming into the grocery store barefoot and in
their bathing suits, they may be scrutinized by others who deem their attire
inappropriate. The manager's decision to publicly humiliate the girls also may have
repercussions among his regular customers who watch the scene. Another theme is that of
individualism. Sammy's seemingly chivalric decision to quit
his job--supposedly out of disgust for the manager's behavior, but more in the hope that
he will impress the girls--shows a streak of individuality missing in the others
present. Although the girls don't even seem to notice, Sammy does take a stand
concerning rules of conduct that conflict with Lengel's store rules and societal
norms.