In these lines it only ever turns up inside 이러고 and 그러고 — 'doing it this way' and 'doing it that way' — used to sum up an action or an attitude and then move on: how am I supposed to do this like this, and then a lot of time passed, Americans want to stand out like that, people who go 'eh, I don't care' and smoke at school. The one to memorise is 그러고 보니, 'now that I think of it', which opens one of these lines. Treat these as fixed words rather than a piece you attach yourself.
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[중국요리가 나올 때마다 지긋지긋하게 따라다니는 채무관계] - 갚으면 줄 거야? - 갚 천 원