THE NUMBERS, EXPLAINED
How to use this calculator.
Lists correspond to the same bag identifiers in the same order; counts reveal bag-level differences without identifying particular garments.
Start with your inputs
Enter items sent by bag, items returned by same bag. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Items sent by bag | 10,8,6 |
| Items returned by same bag | 9,9,6 |
A worked example
With the example inputs above, missing counts by bag is 1, 0, 0. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Missing counts by bag | 1, 0, 0 |
| Surplus counts by bag | 0, 1, 0 |
| Overall sent minus returned | 0 |
How this is calculated
Missing counts by bag
Subtract returned from sent counts, retaining positive shortages.
Surplus counts by bag
Subtract sent from returned counts, retaining positive surpluses.
Overall sent minus returned
Compare total item counts across all bags.
Symbols and units
- a
- Items sent by bag
- b
- Items returned by same bag
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Lists correspond to the same bag identifiers in the same order; counts reveal bag-level differences without identifying particular garments.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Missing counts by bag; Surplus counts by bag; Overall sent minus returned. The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Lists correspond to the same bag identifiers in the same order; counts reveal bag-level differences without identifying particular garments.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax: Solve proportions and their applications ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
Read the quality report →