So, I'm seeing some sort of pattern emerging.
When I use 5 for the number of nights, I get rental_car_cost(1) returned 20....
When I use 1 night, I get rental_car_cost(3) returns 120... 120 is the cost of 40 * 3. why is my '1' somehow becoming a 3??
So I tried yet another approach. Screw this nights/days thing. I changed everything to "days" and I got:
"Oops, try again. plane_ride_cost('Tampa') returned None instead of the correct value 220"
This is leading me more and more to suspect an environment issue. No where do I have it spelled "Tampa". I purposed changed it to lowercase 'tampa' to make input quicker.
*Correction, when I first wrote the code, I did use "Tampa" but changed it a couple of days ago. When I reset it today, it reverted to "Tampa" but I pasted my updated coded with "tampa" in it and it's still seeing "Tampa"