Q: An individual wants to be able to spend €80,000 per year for an anticipated 25 years in retirement. To fund this retirement account, he will make annual deposits of €6,608 at the end of each of his working years. He can earn 6% compounded annually on all investments. The minimum number of deposits that are needed to reach his retirement goal is closest to:
A: Using a financial calculator, the funds needed at retirement (R on the timeline) are calculated: N = 25; I/Y = 6%; PMT = €80,000; Future value (FV) = €0; Mode = End. The calculated present value (PV) is €1,022,668. Then, €1,022,668 is used as the FV (at R on the timeline) for the accumulation phase annuity as per: I/Y = 6%; PV = €0; PMT = −€6,608; FV = €1,022,668; Mode = End. The computed N is 40.
请问这个6608为什么是负号呢？我的理解是每年往账户里存6608，n年后得到1022668，期初账户余额是0.求解答
