Investors who want to know the amount of cash a company has available for new opportunities, such as expanding into a new sales region, should analyze the company's

Free cash flow

Explanation:

 The free cash flow is basically refers to the company cash in which it produces the capital expenditure and the operations in an organization. The free cash flow is basically calculated depending upon the available information and the audience.

The main importance of the FCF (Free cash flow) is that it allow an organization for pursuing the various types of opportunity for enhancing the shareholder value in the market.

Therefore, Free cash flow is the correct answer.  

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