#1

no errors i just dont understand how it picks up 5 as days and 600 as spending money

how does it know 5 goes to days and 600 goes to spending money?

``````def hotel_cost(nights):
return 140 * nights

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 hotel_cost(days) + plane_ride_cost(city) + rental_car_cost(days) + spending_money

print trip_cost("Los Angeles", 5, 600)``````

#2

Hi It know it because of the function you made trip_cost which takes as parameter city, days, spending_money

``def trip_cost(city, days, spending_money):``

if you look to your call function you'll see that (the argument are in the same order of the paramters)

``````trip_cost(city, days, spending_money): #this is the function
trip_cost("Los Angeles", 5, 600) #this is the call function``````

first you put city("Los Angeles") then days(5) and spending_money(600)

#3

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