I always watch them cut fabric also. The last time I bought a lot of fabric at JoAnns they had the 50% off red label fabric I got about 10 kinds of fabric. One kind I only wanted 1/2 yard ($2 a yard), Instead of half a yard he charged me for 50 yards ($100), I caught it before going to checkout.But then, he messed up something else that I didn't catch until I got home, had to go back and have it fixed. You really have to watch everything.