求解一下

嗨，爱思考的PZer你好：

涉及的是 WACC 的概念理解哈，本质是边际成本

我们在评估投资机会时使用的是资本成本，我们处理的是「边际成本」--为潜在投资项目筹集额外资金所需的成本 "Because we are using the cost of capital in the evaluation of investment opportunities, we are dealing with a marginal cost—what it would cost to raise additional funds for the potential investment project."

加权平均资本成本也被称为边际资本成本（MCC），因为它是一个公司为额外资本所承担的成本。这个加权平均数中的权重，是公司用来支持其投资项目的各种资本来源的比例 “The WACC is also referred to as the marginal cost of capital (MCC) because it is the cost that a company incurs for additional capital. The weights in this weighted average are the proportions of the various sources of capital that the company uses to support its investment program.”

所以题目问的 WACC，就是指公司要融资 7.5m 时，所承担的边际成本

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