1,000 is the example result. Read it using the units and relationship stated below.
Change Order uses additional hours, hourly rate.
Protecting contribution before accepting a price
For change order, the relationship is Result = [Additional hours] × [Hourly rate]. The amount depends on the supplied additional hours, hourly rate, rather than a live market price or a value imported from another record. A quote can meet a revenue target and still leave too little to cover delivery. Separate the selling-price denominator from the cost denominator: margin and markup answer different questions. A discount changes contribution even when the supplier cost stays fixed.
Source and result record
For change order, retain Additional hours, Hourly rate together with the output. Record the date of the source values and the unit convention used in the form. That record separates a change in the underlying case from a change in how the information was entered. A saved result without its source values cannot show which assumption produced it.
Example with the supplied inputs
Additional hours: 8; Hourly rate: 125. Result: 1,000. The values are illustrative.
Compare one changed input
Hourly rate changes from 125 to 137.5. The result becomes 1,100. All other inputs remain fixed.
Calculation rule
Result = [Additional hours] × [Hourly rate]
Inputs and output
| Input | Example value | Entry convention |
|---|---|---|
| Additional hours | 8 | Use the duration unit stated in additional hours. A time period is not interchangeable with a currency amount or a count of events. |
| Hourly rate | 125 | Use the source quantity represented by hourly rate. Keep the counted population fixed and avoid mixing a unit value with a period total. |
Output: 1,000 is the example result. Read it using the units and relationship stated below. Use the formula to distinguish a cash amount, count, percentage or ratio.
How to use the page
Collect the inputs
Gather Additional hours, Hourly rate. Use one period and the units shown in the form.
Run the calculation
Enter the values and select the action. The calculation rule above explains how the inputs produce the result.
Compare a scenario
Change Hourly rate on its own, keeping the other inputs fixed. Read both results before changing another assumption.
Worked example
With the example inputs listed above, the result is 1,000.
Change Hourly rate from 125 to 137.5 while keeping every other value fixed. The result becomes 1,100. This comparison isolates that input; it does not forecast how other variables will respond.
Check the stated formula, units and limits before using the result in a decision.
Keep the displayed formula, input units and model scope with the result. Corrections or questions can be sent through the request section on this page.
Content updated: October 11, 2026