Enter two sessions. Compare the result after costs, normalize for time and export the worksheet. All amounts are in-game currency.
| Measure | Session A | Session B |
|---|---|---|
| Sales revenue | — | — |
| Cost of sold stock | — | — |
| Contribution after running costs | — | — |
| Contribution per minute | — | — |
| Gross margin | — | — |
| Markup on cost | — | — |
| Units to cover running costs | — | — |
Contribution = (selling price − unit cost) × units sold − allocated running costs
Break-even units = ceil(running costs ÷ positive unit profit)
Margin divides unit profit by price. Markup divides it by cost. A zero denominator is shown as “Not defined”. Money inputs are rounded to cents before calculation.
Use the same product and comparable conditions, or valid weighted averages. Enter sold-stock cost only once. Unsold purchases, furniture, collection spending and expenses you omit are outside the result.
Different session lengths switch the headline to contribution per minute. Repeat the experiment; a difference in two sessions is not a causal finding.