cost per thousand

例句：

1. 1.The cost per thousand is $50,000.
   每千的成本是5万美元。
2. 2. The company's profit margin is 3% per thousand units sold.
   公司的利润率是每销售一千单位产品3%。
3. 3.The cost per thousand has increased significantly due to the rise in raw material prices.
   由于原材料价格的上涨，每千的成本显著增加。