Stuck on taking a vacation


#1


Hello I am getting this error does anyone know why? I've looked at various examples in the forums but I am stuck and can't work it out. please help:

Traceback (most recent call last):
File "python", line 19, in
File "python", line 18, in trip_cost
TypeError: unsupported operand type(s) for +: 'int' and 'NoneType'

Replace this line with your code. 
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:
        cost -=50
    elif days >=3:
        cost -= 20
    return cost
def trip_cost(city, days, spending_money):
    return rental_car_cost(days) + hotel_cost(days) + plane_ride_cost(city) + spending_money
print trip_cost ("Lost Angeles", 5, 600)


#2

Not found in list. Check your spelling.


#3

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