Blocked

What does this cost per kilogram, so I can compare it with another bag?

ALS-COFFEE-1.1-PRICE-002

This question matters to a buyer and CANNOT be answered from a public product page today. What would be required is stated in full.

Why this cannot be run

Blocked by G-05, G-12.

Assertion

price_per_unit_mass derived_from (derived — see below)

rule
price divided by net mass for the same offer

Applicability

applies when
the product is coffee sold by mass with a readable price
signal
a readable price and a readable net quantity for the same offer

Accepted evidence

  • variant_price — a price for the offer, in the same currency and tax treatment as the selling price
  • product_description — a net quantity for the same offer, from which the unit price is computable

Explicitly insufficient evidence

What does not count, and why. Published because the omission is where a check quietly becomes a claim.

  • value language such as "great value" or "cheaper than your coffee shop"
    No arithmetic is available, so nothing can be compared.
  • a price per pod or per serving
    Dose per capsule varies by roughly a factor of two across systems, so a per-item rate is not a rate per unit mass.
  • a rate computed on gross or shipping weight
    Those include packaging and are systematically high, so the derived figure is wrong in a direction that flatters the seller.
  • a rate computed on the wrong variant
    The classic case is the large size's better rate displayed against a small-size selection, which is exactly the comparison the buyer is trying to make.
  • a rate derived from a strikethrough or reference price
    A price the seller never charged cannot be the basis of a cost comparison.

Conflict rules

  • When the net quantity cannot be attributed to the priced offer — then refuse to derive a figure rather than computing one from mismatched inputs; a derived number reads as more authoritative than the sentence it came from

Discrimination

Predicted fail rate: 30-70% (predicted, not yet measured)

Both inputs are individually common and their attribution to the same offer is not, so the derived assertion should fail materially more often than either input alone. Any derived value inherits every weakness of its inputs, and the net-quantity input has pinned defects, so this is the entry most likely to produce a confidently wrong number.

For a shopper

Price per kilogram is the only way to compare two bags of different sizes, and it is the figure most often missing. If the page shows a price and a weight you can divide them yourself, provided both belong to the size you selected.

For a merchant

Display the unit price alongside the selling price for each purchasable size, computed on net mass in the same currency and tax treatment as the price shown.

Grounding