Hi! I need a bit of help here.
So, I enter what I believe to be is the correct code, but rather, I get this error message:
"Oops, try again. trip_cost('Tampa', 6) raised an error: cannot concatenate 'str' and 'NoneType' objects"
What exactly am I doing wrong?
Here's my code for reference:
def hotel_cost(days): return 140*days def plane_ride_cost(city): if city == "Charlotte": return 183 elif city == "Tampa": return 220 elif city == "Pittsburgh": return 222 elif city == "Los Angeles": return 475 def rental_car_cost(days): cost = 40*days if days >= 7: return cost - 50 elif days >=3: return cost - 20 return cost def trip_cost(days, city): return hotel_cost(days) + plane_ride_cost(city) + rental_car_cost(days)