WORKED HOUSEHOLD EXAMPLE · USER-ENTERED VALUES

Rebuild after recording four measured treatments

Illustrative inputs, not verified product specifications or care recommendations.

The household question

Four ten-millilitre treatments reduce the open bottle by 40 ml.

Light-colored laundry hanging on an indoor drying rack
Photo: Lidia Bekenova / Pexels

Measurements and assumptions

Before the change

Full bottles0
Bottle capacity (ml)500
Open bottle remaining (ml)180
Amount per treatment (ml)10
Item nameRebuild after recording four measured treatments
Storage locationHousehold supply shelf
Minimum stock0

After the change

Full bottles0
Bottle capacity (ml)500
Open bottle remaining (ml)140
Amount per treatment (ml)10
Item nameRebuild after recording four measured treatments
Storage locationHousehold supply shelf
Minimum stock0

Carry out this task

  1. Create or open the Before record on the linked tool.
  2. Save the new remainder before rebuilding the bottle label.
  3. Check the saved After values before downloading the rebuilt label. Replace the older physical label.

Calculation and observed tool result

Before

Stock = 0 × 500 + 180 = 180 ml; floor(180 ÷ 10) = 18 treatments

Recorded quantity: 180 ml.

After

Stock = 0 × 500 + 140 = 140 ml; floor(140 ÷ 10) = 14 treatments

Recorded quantity: 140 ml.

What the result means

The updated label corresponds to fourteen rather than eighteen treatments.

Limits of this example

Remove the older physical snapshot when relabeling.

A mistake to avoid

The QR cannot detect treatment events on its own.

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