Each has significant advantages - it means you do NOT need a state-certified scale for transactions; you just count.

It was obvious that that Target had never priced anything per pound before (it had just been remodeled to have a supermarket) and an employee fat-fingered the label. But the cashier had no recourse and I wasn't going to fight it hard.

(The same Target also had some clearance steaks for like ten cents a pound because they were close to expiration because none of the customers were expecting a supermarket in their target and weren’t buying perishables.)