📝 **Predpovedz** výstup: ```python items = [{"id": 1, "total": 10}, {"id": 2, "total": 20}, {"id": 3, "total": 30}] total_revenue = sum(item["total"] for item in items) print(total_revenue) ``` 💡 `sum()` na generátore spočíta všetky hodnoty.