please assist i keep getting:

Oops, try again. trip_cost('Los Angeles', 7) returned 1210 instead of the correct value 1685.

not sure what to do or where exactly the error is.

```
def hotel_cost(nights):
nights * 140
return nights * 140
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
else:
return False
def rental_car_cost(days):
rent = days * 40
if days >= 7:
rent = rent - 50
return rent
elif days >= 3:
rent = rent - 20
return rent
else:
return rent
def trip_cost(days,city):
days = 7
return rental_car_cost(days) + plane_ride_cost(city) + hotel_cost(days)
```