THE NUMBERS, EXPLAINED
How to use this calculator.
Unmatched active records and departed-member records are disjoint. Inventory audit only; card deactivation status must be checked in the access system.
Start with your inputs
Enter cards issued to active members, cards returned by active members, cards issued to departed members, cards returned by departed members, active-member card records with no valid member match. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Cards issued to active members | 100 |
| Cards returned by active members | 5 |
| Cards issued to departed members | 30 |
| Cards returned by departed members | 20 |
| Active-member card records with no valid member match | 2 |
A worked example
With the example inputs above, active-member cards still outstanding is 95. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Active-member cards still outstanding | 95 |
| Departed-member cards not returned | 10 |
| Outstanding cards requiring record review | 12 |
How this is calculated
Active-member cards still outstanding
Subtract active-member returns from issues.
Departed-member cards not returned
Count unreturned cards assigned to former members.
Outstanding cards requiring record review
Combine departed-member outstanding cards and unmatched active records.
Symbols and units
- a
- Cards issued to active members
- b
- Cards returned by active members
- c
- Cards issued to departed members
- d
- Cards returned by departed members
- e
- Active-member card records with no valid member match
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
Unmatched active records and departed-member records are disjoint. Inventory audit only; card deactivation status must be checked in the access system.
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?
Active-member cards still outstanding; Departed-member cards not returned; Outstanding cards requiring record review. 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: Unmatched active records and departed-member records are disjoint. Inventory audit only; card deactivation status must be checked in the access system.
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: Describe and Identify Cost Drivers ↗
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 →