input: Write a python function to calculate the total pay and total expenses based on hours worked, hourly rate, and travel expenses.
  assert calculate_finances(160, 20, 100) == (3200, 100)
  assert calculate_finances(200, 15, 50) == (3000, 50)
  assert calculate_finances(120, 25, 200) == (3000, 200)
output: def calculate_finances(hours_worked, hourly_rate, travel_expenses):
      total_pay = hours_worked * hourly_rate
      total_expenses = travel_expenses
      return total_pay, total_expenses