Niether you nor anyone else can "calculate" the opening price or the closing price of a security that trades in the open market.

Previous years' information does not and can not help you determine the price nor can the revenue, cost of sales, expenses, inventories, assets or liabilities

This is a question usually used in th academic world by professors who have no concept of how the stock market operates. None of this information is helpful nor can it help you find the solution

The opening price of a stock will be either the best bid or best offering at the time of the opening

Hi,

I have no idea how to find the opening stock and closing stock, as it doesn't say, but you have to work it out. I have googled it. All I have is revenue, cost of sales, expenses, inventories, assets, liabilities, etc... What do I do to find the opening & closing stock? (and I have of the previous years too)

Thanks in advance.