This is program that allows user to see how much they are gonna spend to take a vacation. At first I define a function called hotel_cost with one argument nights as input. Then I defined a function called plane_ride_cost that takes a string, city, as input and the function return a different price depending on the location of the city. After that I defined another function called rental_car_cost with an argument called days. In the end I defined a function called trip_cost that takes three arguments, city,days and spending_money. Those function and inputs all add up to the total cost of the trip and how much the user have to budget for the vacation.