Dollar General

I live in Parma and go to this Dollar General whenever I don't want to drive into Jackson for something. I will no longer be doing this because the ladt THREE times in a row they have rang up my merchandise at the wrong price. I would of course bring it to their attention and the cashier (clearly irritated) would question me and then go back to the sign and have to re-ring me up. The second time the cashier read the sign and told me I was wrong and I had to point out each aspect that proved the price it rang up at was incorrect. This last time I didn't even bother correcting them, I am done shopping there.