Re: watching the register I keep a running tally of tally marks on my grocery list. I do the price AFTER Q, so all I have as an unknown is the tax and like nrpeace said, that's not enough to really throw my math off.
Also, when I have more than 2 or 3 of a Q, I count how many there are and I tell the cashier, "I have 10 of these and they are slick, so I just wanted to tell you". Many times they will just scan one of them that many times after they double check. |