I once worked behind the counter and did years of advising new sewers in the need for allowances along with proper training of clerks that weren't familiar with the fabric area of JoAnn's. Never did find anyone that didn't appreciate it. I for one would have found the right words to "help" them out on both sides of the counter. So many new clerks are shown how to cut but not how to read a pattern or advise the customer. What a shame ut now you know step up and see how it's received. You'll know right away if they just want to cover the space or learn to create.