input: Write a python function to calculate the total cost of items in a bill.
  assert calculate_total_cost([{'item': 'burger', 'price': 10.99}, {'item': 'fries', 'price': 2.49}]) == 13.48
  assert calculate_total_cost([{'item': 'pizza', 'price': 15.99}, {'item': 'soda', 'price': 1.99}, {'item': 'salad', 'price': 4.99}]) == 22.97
  assert calculate_total_cost([{'item': 'sandwich', 'price': 5.99}, {'item': 'coffee', 'price': 2.99}]) == 8.98
output: def calculate_total_cost(bill):
      total_cost = sum(item['price'] for item in bill)
      return total_cost