请问 opportunity cost 计算的比较价格就是每天的收盘价吗？这是什么原理

问题如下：

Based on Exhibit 1, the opportunity cost for purchasing the 90,000 shares of BYYP is:

选项：

$22,500.

$60,000.

$75,000

解释：

Correct Answer: C

Opportunity cost is based on the number of shares left unexecuted in the order and reflects the cost of not being able to execute all shares at the decision price. The opportunity cost is calculated as:

Opportunity cost = (120,000 – 90,000) × ($42.50 – $40.00)

= $75,000