calculating rental_car_cost

Error message reads "Oops, try again. It looks like rental_car_cost returns 120 instead of the correct amount (100) for 3 days."

I can't figure out where I went wrong with my code. I'll also point out that I'm experimenting with the 3 <= days <= 6 to see if that is valid, which I can't see yet. If it is not valid, then I will change that to days == 3 or 4 or 5 or 6. But I'm sure there is a better way than that.

```
def rental_car_cost(days):
if days == 1 or 2:
return days * 40
elif 3 <= days <= 6:
return days * 40 - 20
elif days >= 7:
return days * 40 - 50
```