代码学院的一个小项目给我一个错误，但我不确定在哪里

Question

我目前正在学习 python 并做我的第一个小项目来制作收据创建工具， 但我遇到了一个问题。

lovely_loveseat_description = "Lovely Loveseat. Tufted polyester blend on wood. 32 inches high x 40 inches wide x 30 inches deep. Red or white."
lovely_loveseat_price = 254.00

stylish_settee_descrption = "Stylish Settee. Faux leather on birch. 29.50 inches high x 54.75 inches wide x 28 inches deep. Black."
stylish_settee_price = 180.50

luxurious_lamp_description = "Luxurious Lamp. Glass and iron. 36 inches tall. Brown with cream shade."
luxurious_lamp_price = 52.15

sales_tax = .088

customer_one_total = 0 
customer_one_itemization = ""

customer_one_total +=lovely_loveseat_price
customer_one_itemization +=
lovely_loveseat_description

customer_one_total += luxurious_lamp_price
customer_one_itemization += 
luxurious_lamp_description

customer_one_tax = customer_one_total * sales_tax 

customer_one_total += customer_one_tax

print("Customer One Items:")

当我试图运行它以确保一切正常时，我得到一个错误，但我不确定我做错了什么。

这是我收到的错误：

File "script.py", line 16
    customer_one_itemization +=
                              ^
SyntaxError: invalid syntax

我期望它做的是打印“Customer One Items”的声明，但它没有。