Open a pack without reducing usable roll stock
Illustrative inputs, not verified product specifications or care recommendations.The household question
A sealed nine-roll pack is unpacked onto the shelf.

Measurements and assumptions
Before the change
| Full packs | 1 |
|---|---|
| Rolls per pack | 9 |
| Loose rolls | 2 |
| Item name | Open a pack without reducing usable roll stock |
| Storage location | Household supply shelf |
| Minimum stock | 0 |
After the change
| Full packs | 0 |
|---|---|
| Rolls per pack | 9 |
| Loose rolls | 11 |
| Item name | Open a pack without reducing usable roll stock |
| Storage location | Household supply shelf |
| Minimum stock | 0 |
Carry out this task
- Save the Before values on the linked tool.
- Move the opened pack into the loose count in one edit.
- Calculate & Save the After values on the same item. Check the ID is retained rather than creating another physical item.
Calculation and observed tool result
Before
1 × 9 + 2 = 11 rollsRecorded quantity: 11 rolls.
After
0 × 9 + 11 = 11 rollsRecorded quantity: 11 rolls.
What the result means
The total remains eleven rolls before any roll is used.
Limits of this example
Loose count can exceed a retail pack size when several packs are opened.
A mistake to avoid
Leaving both components unchanged would double-count the opened pack.
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