凯特·麦凯纳：我们知道他们的销售价格，但他们的单位成本是怎样的？
KATE MCKENNA: We know their selling price, but what 's their unit cost?
凯特·麦凯纳：我们知道他们的销售价格，但他们的单位成本是怎样的？
KATE MCKENNA: We know their selling price, but what "s their unit cost?"
凯特·麦凯纳：我们知道他们的销售价格，但他们的单位成本是怎样的？
KATE MCKENNA: We know their selling price, but what "s their unit cost?"
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