Those are not good examples. One is sugar water with extremely high profit margins, and the other is likely sold as a loss leader or at most, at cost.
Food prices have been changing for a long time, but only if you pay attention to quantity and ingredients. With gas prices, the unit quantity or ingredient cannot change, so the change is obvious. Same with things like milk and eggs and vegetables though, which do change often.
With processed food, the seller has much more ability to maneuver around having to increase price.
Yeah - my point was that once prices start going up noticeably, all the other processed food manufacturers will increase their prices, also (often with a "return to what the original size was" along with it).
Logically, if the same quantity of Arizona Ice Tea retails for the same price as it did 25 years ago, then someone in the supply chain is or was making huge profit margins, considering the increase in materials and transport costs.
Food prices have been changing for a long time, but only if you pay attention to quantity and ingredients. With gas prices, the unit quantity or ingredient cannot change, so the change is obvious. Same with things like milk and eggs and vegetables though, which do change often.
With processed food, the seller has much more ability to maneuver around having to increase price.