amount = 0
total_cost = 0
money_saved = 0
#設置輸入
price = input (“輸入價格”：）
while price > 0:
total_cost = total_cost + price
amount +=1
if amount < 4:
total_off = total_cost * (1- amount/10.00)
#如果有變量
else:
total_off = total * 0.6
money_saved = total_cost - total_off
#輸出價格，節省的金額和，實際支付的價格
print "幾件物品： ",amount
print "總支付(?): ",total_off
print "節省金額?" , money_saved