THE NUMBERS, EXPLAINED
How to use this calculator.
Same component services and costs in both purchase options. Processing time without active staff is excluded from labour hours.
Start with your inputs
Enter bundle selling price (currency), consumable cost by service (currency), active staff minutes by service, loaded staff hourly cost (currency), bundle discount versus separate list prices (currency). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Bundle selling price (currency) | 100 |
| Consumable cost by service (currency) | 10,15 |
| Active staff minutes by service | 30,45 |
| Loaded staff hourly cost (currency) | 20 |
| Bundle discount versus separate list prices (currency) | 20 |
A worked example
With the example inputs above, total active staff time (minutes) is 75. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Total active staff time (minutes) | 75 |
| Bundle contribution after labour (currency) | 50 |
| Contribution per active staff-hour | 40 |
| Separate-price contribution (currency) | 70 |
How this is calculated
Total active staff time (minutes)
Add active labour for all bundle components.
Bundle contribution after labour (currency)
Deduct consumables and supplied labour cost.
Contribution per active staff-hour
Normalize contribution by active labour time.
Separate-price contribution (currency)
Restore the given discount to compare identical services sold separately.
Symbols and units
- a
- Bundle selling price (currency)
- b
- Consumable cost by service (currency)
- c
- Active staff minutes by service
- d
- Loaded staff hourly cost (currency)
- e
- Bundle discount versus separate list prices (currency)
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
Same component services and costs in both purchase options. Processing time without active staff is excluded from labour hours.
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?
Total active staff time (minutes); Bundle contribution after labour (currency); Contribution per active staff-hour; Separate-price contribution (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: Same component services and costs in both purchase options. Processing time without active staff is excluded from labour hours.
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 →