What is wrong with buying the entire piece? I routinely bring over a bolt that has a short bit left and ask that it be measured. Many clerks are happy to not have to cut, cut, cut.
The clerks are there to *measure and cut* fabric for the customers! You make it sound like Juno was demanding acrobatics or something. (Have you ever been in a fabric store??)
Just the other day I had to stop an eager clerk who picked up the scissors. My sister found her some Princess Leia white drapey stuff, and asked, "is there 6 yards left?" The clerk measured off 6 yards and was about to cut off the "unwanted" 1/2 yard that remained. Of course, she had a better excuse than Juno's clerk: a non-native English speaker.
HTH
--Karen D.