print("欢迎使用电费计算器")
elec_num = 1876
charge = (2400.4678)+(400-240)0.5455 + (elec_num-400)*0.76
print("你本月的用电量为：")
print(elec_num)
print("你本月的话费为")
print(charge)

print("欢迎使用收银台程序")
goods = input("请输入货物名称")
price = input("请输入价格")
num = input("请输入货物数量")
total = float(price) int(num)
print("商品的实际应该支付金额")
print(total)
alplay = total 0.9
print("支付宝打9折应该支付金额")
print(int(alplay))