Box office at most Broadway shows rose in week 14 (Aug. 27-Sept. 2) in what’s likely to be a last hurrah of summer sales, just prior to the back-to-school plummet that follows after Labor Day.A handful benefitted from last-minute biz, with the final frame of “One Man, Two Guvnors” ($853,768) pushing B.O. up by more than $100,000, breaking the house record at the Music Box and landing in the week’s Top 10. “Clybourne Park” ($486,336), which also closed Sept. 2, hit its best-ever tally. Biggest bump of the frame was reported at “Nice Work if You Can Get It” ($896,413), improving 78%, thanks to the return of topliner Matthew Broderick, who had been out the prior sesh. Broadway cume remained almost exactly on par with the prior frame, coming in at $19.3 million for the 22 shows on the boards. Attendance slipped by about 6,500 to 190,433, or 84% of overall Main Stem capacity. If prior years are any indication, the coming few weeks will prove an uphill battle, with the early-fall slowdown eventually counteracted by the growing drive of a season that officially begins with “Chaplin’s” bow. The 17 musicals grossed $16,345,099 for 84.8% of the Broadway total, with attendance of 156,619 and an average paid admission of $104.36. The five plays grossed $2,930,142 for 15.2% of the Broadway total, with attendance of 33,814 and an average paid admission of $86.65.