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@@ -40,6 +40,12 @@ It's also possible to give `api_key` as parameter to the initiation of the `rage
 
 ---
 
+## Costs
+You can chat the whole day with the bots for just ten cents or so. See here how much it costed to test it extensively.
+![Intense usage costs.](costs.png)
+
+---
+
 ## Included Discussion Demo
 This is example output of the `python -m ragent.demo_discuss`.
 
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