# Business sample worksheet

Use `business-sample.csv`. The figures are synthetic. Do not add names or private customer data.

For each row calculate revenue (`units * price`), direct cost (`units * cost_per_unit`), and contribution (`revenue - direct cost`). Then calculate totals and answer the questions.

| Order | Revenue | Direct cost | Contribution |
|---:|---:|---:|---:|
| 1 | | | |
| 2 | | | |
| 3 | | | |
| 4 | | | |
| 5 | | | |
| **Total** | | | |

1. Which service has the highest total contribution in this sample?
2. What would you need to know before treating this sample as a business forecast?
3. Name one human check before an AI-assisted pricing or ordering suggestion is used.

## Calculation key

Rows 1–5 are respectively revenue/direct cost/contribution: **48/12/36**, **108/42/66**, **75/27/48**, **36/14/22**, and **60/15/45**. Totals are **327 revenue, 110 direct cost, 217 contribution**. Workshop kit contributes 88, poster review 81, and data cleanup 48. The sample does not include labor, overhead, taxes, refunds, demand, or timing, so it is not a forecast.