There's no one who doesn't enjoy a fine beverage

I am addicted to cans of diet, caffeine-free cola, preferably Pepsi. Lately, the 8-pack has been introduced, turning the pricing structure into a giant sixth-grade arithmetic problem. The end product is the unit price, so one must calculate how multiples of 12-pack or 8-pack units compare to the 24-pack (cube), vis-a-vis the price per can. That, in addition to the stores who hire people to change the prices weekly, seemingly to confuse the consumers, and test their patience.