问题如下：
Given that a sculpture is produced and sold in 2015 at the price of $1000, the process of producing the sculpture costs $300. When calculating GDP based on the sum-of-value-added method, the last step of creating the sculpture has a value of:
选项：
A.$1,000.
B.$700.
C.$300.
解释：
B is correct.
In the final step, the value added is $1000– $300 = $700
考点：GDP的计算
解析：本题比较常规，直接用最终产品的价值减去上一步商品的价值即可。
$1000– $300 = $700。
题目不是说the process of producing the sculpture costs $300，这不应该就是制作雕塑的成本嘛？
然后问题是问最后制作过程值多少钱？那不应该直接是$300?
