I do the same thing. The shopping list says "milk", I look at the options on the shelf and select a suitable one. Price is likely a parameter, but since it's ju

I do the same thing. The shopping list says "milk", I look at the options on the shelf and select a suitable one. Price is likely a parameter, but since it's just a local decision I've more or less forgotten the actual numbers a minute later. I suppose I would notice if the price was suddenly $5 for something that usually costs $1, but for many items I'm not even sure I would.