def amount(tax, item): return item * tax/100 def HK_city_tax(item): return amount(5,item) def US_city_tax(item): return comount(10,item) item = 10 HK_tax = lambda item : amount(5,item) US_tax = lambda item : amount(10,item) total_price = item + HK_city_tax(item) total_price = item + US_city_tax(item) print(total_price)