same-blog posts

I always wondered what was meant by "same-store sales." Now I know ... and knowing has made me stupider:

Best Buy's same store sales -- an important retail industry metric -- fell 5.3 percent from 2007 for the quarter ending Nov. 29. Same-store sales, which worsened every month in the period, are considered a key indicator of a retailer's health because they measure sales at existing stores rather than newly opened ones.

How about just "established store sales"? Leave it to businessmen to mangle language beyond all relevant meaning.