I need help finding the FV to answer this formula:

Suppose that a potential buyer has offered to buy this company in three years. Based on the initial present value you calculated above in A1, what would be a reasonable amount for the buyer to pay for the company in three years' time?

Since the PV = -13,617.88

The future value of the above figure at the end of 3rd year stands at

-13,617.88 * (1.08)^3 = -17154.61

NPV = -17154.61 - "I have no idea, how to get the number that should be subtracted"

The given Interest Rate is 8%