Наиболее часто можно услышать: "Bottom line, ..."

Marina, В этом случае, слово "shorter" (короче) не используется в английском языке. синонимы briefly speaking, more succinctly speaking, to be brief, briefly, in short, in a word, concisely, succinctly, in sum, to sum up, in brief, in a few words, all things considered, when all's said and done, in summary, in a nutshell, to make a long story short