Assuming there is no abandonment option, what is the projects NPV?

Assuming McCool follows the abandonment strategy, what is the projects NPV inclusive of the abandonment option?

McCool Air Conditioning Systems is considering a capital project with the following characteristics: The initial investment outlay is $500,000. The project life is three years. Annual operating cash flows have a 50% probability of being $100,000 for three years and a 50% probability of being $280,000 for three years. The required rate of return on the project is 10%. There is zero salvage value at project termination In one year, after realizing the first cash flow, the company has the opportunity to abandon the project and receive a cash flow of $250,000