Price Per Gram Math Has Entered Review
Someone starts comparing unit prices for products that used to be chosen by habit.
Price Per Gram Math Has Entered Review Findings from the Grocery Aisle, with Annotated Observations
The subject is buying oats. The subject has bought the same brand of oats for three years without incident. Today, the subject turns the package over and calculates the price per hundred grams. Then calculates it for the adjacent brand. Then the store brand. The oats were not on sale. Nothing prompted the calculation. The calculation happened because the year was 2022 and prices had become interesting in a way that required personal auditing.
The oats the subject has always bought are not the cheapest. This is new information about an old fact.
First Consequence
The first case of price per gram math changes one small decision without being discussed. The subject now approaches the cereal aisle with a phone calculator visible. This is not performative. It is logistical. The number of variables requiring calculation has exceeded working memory. The phone is infrastructure.
Other shoppers observe the calculator. Nobody says anything. By March 2022, this is a recognized behavior and requires no explanation.
Second Consequence
After repetition, other people begin adjusting their behavior around price per gram math. A household member who previously grabbed the familiar brand now pauses at the shelf, looks at the subject, and waits. The subject has become the unit pricing authority for this household. The subject did not apply for this role. The role was assigned through demonstrated competence at a task nobody wanted to do.
Third Consequence
Eventually price per gram math acquires an unwritten enforcement system that everyone denies creating. A purchase made without calculation now feels like a lapse. The subject feels this even for items where the calculation would produce no useful distinction, where every option costs the same per gram, where the math is genuinely pointless. The math happens anyway. It has become habit faster than any of the habits it was meant to replace.
The Absurd Rule
Every remembered old price remains legally active as a comparison point until the buyer stops mentioning it. The old price serves as testimony. It is referenced in informal hearings that take place at checkouts, at kitchen tables, in text messages to other people who also remember the old price. The hearings reach no verdict. They continue.
The Contradiction
The purchase is ordinary, yet each price now feels like evidence in a private economic investigation.
The investigation has no conclusion date. The evidence accumulates. In 2022, this was called staying informed. Nobody called it what it was, which was continuous low-grade economic anxiety converted into arithmetic.