Compare the operating models
A fictional mug sells by piece; sealed tea sells as one fixed 100g pack; loose tea sells at accepted 0.18kg. A label mentioning grams does not mean every sale is weighed. Supplied loose-tea rate is HKD200/kg.
| Business requirement | Counted item/pack | Actual measured quantity |
|---|---|---|
| One mug | Quantity 1 piece | No weight pricing here |
| One 100g tea pack | Quantity 1 pack | Fixed label is not a fresh measurement |
| Loose tea | One bag hides weight basis | 0.18kg × HKD200/kg |
Work through the chosen model
The sale line stores item identity, quantity, unit and price basis. Measured sales also retain the accepted measurement reference under shop policy. Do not strip kg from the quantity or confuse the fixed pack’s content label with the sale count.
- Choose counted or measured offer
- Capture actual sale quantity and unit
- Show matching price basis
Measured selling captures real quantities but needs reliable measurement and unit handling. Counted packs simplify checkout; exact local weighing/pricing obligations need separate review.
The mug and pack each have count one. Loose tea costs HKD36 from 0.18 × 200. That is a filled example, not a weighing-device integration or legal scale certification.
When the other model fits
The store changes to sealed packs sold only at a fixed pack price. Keep asking weight each sale?
Show the worked answer
No. Capture pack count; keep pack contents as product information.