Subject: Re: can't pay a penny for a thought
In the days of mechanical registers, this would be a big program,

Nah. Piece of duct tape over the final digit in the read out window would have done it. The worst the business would have suffered would have been 9˘. Average would have been a nickel on a basket of goods; raise prices a penny here or there and it’s covered.

Saw the same kind of thing when gas prices went higher than the pumps would allow. They started selling “half gallons” so the pump could register the price correctly.