Does each sale leave anything?
Change the costs. Find the point where a busy stall stops working.
Try the experiment →Move something. Make a prediction. See what changes.
Free to try. No account, equipment or purchase needed.
Browse all short lessons →Change the costs. Find the point where a busy stall stops working.
Try the experiment →Make one small commitment you can actually test.
Try the five-minute lesson →Separate a possible biological effect from a changed condition.
Try the comparison →Imagine selling an item for 50. Setup costs 300. Move the cost per item and predict how many sales cover setup.
Fictional currency units. This simple model leaves out time, fees and unsold stock.
Scratch space only. This experiment does not save notes, award a certificate or send your prediction.
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