def calculate_discount(total_amount): if total_amount >= 4000: discount = 0.60 elif total_amount >= 3000: discount = 0.70 elif total_amount >= 2000: discount = 0.80 else: discount = 1.00 discounted_amount = total_amount * discount return round(discounted_amount, 1) total_to_test = 3500 discounted_price = calculate_discount(total_to_test) print(f"折扣后的金额：{discounted_price}元")