to the ongoing 'discussion'

You run a cigarette store and Gene and I are two of your customers. I buy a pack each day but he buy them a carton at a time. A pack is $5, a carton is $50. On the 8th day, you put the prices up to $6 and $60. By someone here's rationale you not only start charging me $6 a day but you also ask Gene to cough up $10 for the carton he bought at $50 last week. Go figure