In this guide
Add cost and quantity separatelyCompare the incorrect shortcutDefine what your result coversDo not convert it into a service cost yetIf an operational record combines credit purchases made at different unit rates, a simple average of the displayed rates can misstate the average cost. A quantity-weighted calculation uses the total purchase cost divided by the total credits purchased. Keep it as an internal calculation rather than a provider billing rule.
Add cost and quantity separately
In a labelled example, buying one 60-credit package at USD 95.40 and one 120-credit package at USD 178.80 gives 180 credits purchased at a combined published package cost of USD 274.20. Divide 274.20 by 180 to obtain approximately USD 1.5233 per purchased credit.
Compare the incorrect shortcut
Averaging 1.59 and 1.49 gives 1.54, but it gives the two packages equal weight even though the second contains twice as many credits. The weighted result reflects the actual quantities. Round only the displayed result; keep sufficient precision in the underlying calculation so later multiplication does not accumulate avoidable rounding differences.
| Example purchase | Credits | USD cost |
|---|---|---|
| 60-credit package | 60 | 95.40 |
| 120-credit package | 120 | 178.80 |
| Combined | 180 | 274.20 |
| Weighted average | 274.20 ÷ 180 | Approximately 1.5233 per credit |
Define what your result covers
This example covers the published package cost only. It does not include exchange charges, taxes, payment fees or overhead unless your own record adds actual amounts under separate headings. It also does not establish the accounting method a business must use for financial reporting. Ask an appropriate adviser about reporting requirements where needed.
Do not convert it into a service cost yet
A service-term cost requires the provider’s confirmed credit consumption for that specific action. A weighted purchased-credit figure alone cannot tell you how much a renewal or account creation costs. Keep the provider’s consumption mapping and your internal cost calculation as separate documented inputs.
Questions about this guide
Can the result be used as a guaranteed resale margin?
No. It is a calculation of the combined published purchase cost per credit in this example. Revenue, consumption, fees, overhead, permitted pricing and any reporting method are separate inputs. None is established by the average itself.