A computer maker is considering a project to develop and sell a new ultra-light laptop that will weigh considerably less than any of the company's existing laptops. The marketing department has estimated that this new ultra-light will cause the sales and cash flows generated by the company's existing line-up of laptops to fall. The reduced cash flows are most likely an example of what concept?

1-Nonconventional cash flow

2-Externality

3-Sunk cost