THE NUMBERS, EXPLAINED
How to use this calculator.
A quote remains valid through its expiry day. Price increases are user scenarios; no market forecast or contractual enforceability inference.
Start with your inputs
Enter quoted material costs by line (currency), days until supplier quote expires, planned purchase days from today, assumed increase after expiry (%). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Quoted material costs by line (currency) | 1000,500 |
| Days until supplier quote expires | 10,30 |
| Planned purchase days from today | 20,20 |
| Assumed increase after expiry (%) | 10 |
A worked example
With the example inputs above, material cost exposed to expiry (currency) is 1,000. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Material cost exposed to expiry (currency) | 1,000 |
| Scenario extra cost (currency) | 100 |
| Revised material budget (currency) | 1,600 |
How this is calculated
Material cost exposed to expiry (currency)
Select purchases scheduled after the quoted price expires.
Scenario extra cost (currency)
Apply the assumed price increase only to exposed costs.
Revised material budget (currency)
Add the exposure contingency to original material costs.
Symbols and units
- a
- Quoted material costs by line (currency)
- b
- Days until supplier quote expires
- c
- Planned purchase days from today
- d
- Assumed increase after expiry (%)
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
A quote remains valid through its expiry day. Price increases are user scenarios; no market forecast or contractual enforceability inference.
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?
Material cost exposed to expiry (currency); Scenario extra cost (currency); Revised material budget (currency). 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: A quote remains valid through its expiry day. Price increases are user scenarios; no market forecast or contractual enforceability inference.
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 →