THE NUMBERS, EXPLAINED
How to use this calculator.
Assumes the user has verified policy eligibility. Claim is the nonnegative price drop less deduction, capped by the entered policy maximum.
Start with your inputs
Enter original eligible purchase price, current eligible price, claim deduction, supplied maximum refund. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Original eligible purchase price | 120 |
| Current eligible price | 90 |
| Claim deduction | 5 |
| Supplied maximum refund | 50 |
A worked example
With the example inputs above, gross price decrease is 30. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Gross price decrease | 30 |
| Potential claim | 25 |
| Effective original purchase cost after claim | 95 |
How this is calculated
Gross price decrease
Subtract current eligible price from original price, floored at zero.
Potential claim
Subtract deduction from price decrease and apply the cap.
Effective original purchase cost after claim
Subtract potential claim from original price.
Symbols and units
- a
- Original eligible purchase price
- b
- Current eligible price
- c
- Claim deduction
- d
- Supplied maximum refund
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
Assumes the user has verified policy eligibility. Claim is the nonnegative price drop less deduction, capped by the entered policy maximum.
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?
Gross price decrease; Potential claim; Effective original purchase cost after claim. 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: Assumes the user has verified policy eligibility. Claim is the nonnegative price drop less deduction, capped by the entered policy maximum.
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 →