I mean… I’ll regularly go to the grocery store and see soda prices vary by 200-300% week-to-week. Sure, it’s all based around “sale” value, but it amounts to the same thing. If it’s $9 for 2 12-packs one week and then $11 for a 12-pack the next week, it isn’t an invalid markup because you had to buy 2 to get the first price.