THE NUMBERS, EXPLAINED
How to use this calculator.
Returned item receives purchase price less percentage restocking charge. Original shipping and return postage are not refunded. No probability assumption.
Start with your inputs
Enter purchase price, original nonrefundable shipping, return postage, restocking rate (%). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Purchase price | 100 |
| Original nonrefundable shipping | 5 |
| Return postage | 10 |
| Restocking rate (%) | 15 |
A worked example
With the example inputs above, keep outcome cost is 105. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Keep outcome cost | 105 |
| Return refund | 85 |
| Return outcome net cost | 30 |
How this is calculated
Keep outcome cost
Add purchase price and original shipping.
Return refund
Deduct restocking percentage from item price.
Return outcome net cost
Add nonrefunded shipping, return postage and restocking deduction.
Symbols and units
- a
- Purchase price
- b
- Original nonrefundable shipping
- c
- Return postage
- d
- Restocking rate (%)
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
Returned item receives purchase price less percentage restocking charge. Original shipping and return postage are not refunded. No probability assumption.
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?
Keep outcome cost; Return refund; Return outcome net cost. 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: Returned item receives purchase price less percentage restocking charge. Original shipping and return postage are not refunded. No probability assumption.
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 →