Taking a vacaion lesson 5, I have some invalid syntax here but I'm not able to figure out what I'm doing wrong?? Seeking some tips please...

File "python", line 24

return rental_car_cost(days) + hotel_cost(days) +

^

SyntaxError: invalid syntax

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