40 is the example result. Read it using the units and relationship stated below.
FBA Storage per Unit uses units stored, monthly storage per unit, months.
Protecting contribution before accepting a price
For fba storage per unit, the relationship is Result = [Units stored] × [Monthly storage per unit] × [Months]. The amount depends on the supplied units stored, monthly storage per unit, 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.
What the model includes
Result = [Units stored] × [Monthly storage per unit] × [Months] A pricing review should retain the supplier cost, sale price and the reason for any allowance. Returns, payment charges, delivery and tax require explicit treatment; they should not disappear inside a percentage labelled profit. Compare the proposed price with the customer agreement and delivery capacity. A mathematically achievable margin does not establish that buyers will accept the offer.
Example with the supplied inputs
Units stored: 500; Monthly storage per unit: 0.08; Months: 1. Result: 40. The values are illustrative.
Compare one changed input
Units stored changes from 500 to 550. The result becomes 44. All other inputs remain fixed.
Calculation rule
Result = [Units stored] × [Monthly storage per unit] × [Months]
Inputs and output
| Input | Example value | Entry convention |
|---|---|---|
| Units stored | 500 | Use the source quantity represented by units stored. Keep the counted population fixed and avoid mixing a unit value with a period total. |
| Monthly storage per unit | 0.08 | Use the source quantity represented by monthly storage per unit. Keep the counted population fixed and avoid mixing a unit value with a period total. |
| Months | 1 | Use the duration unit stated in months. A time period is not interchangeable with a currency amount or a count of events. |
Output: 40 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 Units stored, Monthly storage per unit, Months. 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 Units stored 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 40.
Change Units stored from 500 to 550 while keeping every other value fixed. The result becomes 44. 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