input: Write a python function to calculate the total cost of a trip given the flight cost, hotel cost, and other expenses.
  assert calculate_total_cost(500, 350, 200) == 1050
  assert calculate_total_cost(1000, 800, 300) == 2100
  assert calculate_total_cost(300, 200, 100) == 600
output: def calculate_total_cost(flight_cost, hotel_cost, other_expenses):
      return flight_cost + hotel_cost + other_expenses