Soon and too soon the Big Box Stores move into the neighborhood and eliminate the Mom and Pop (M&P) shops. I was going to purchase 500#'s of whole kernel corn from the local M&P Feed Store, until the owner's wife became belligerent. She was about to ring up my 100# sunflower seed order when I asked the price of her 50# bags of corn.
She offered me a whooping price that was "real proud" at more than 135% of the Big Box Store price I had just checked. When I mentioned that price difference to her, she came undone, and read me the riot act.
She showed me her invoice. Her wholesaler sold her corn at more than 20% above the Big Box retail price! My wife, a known for rapier wit CPA, suggested that I tell the lady to buy her corn from the Big Box Store, which would increase her profit by more than 20%! Not on your life!