Keven Winthrop is saving for an Australian Vacation in three years. He estimates that he will need $5000 to cover his airfare and all the other expences for a Week-long holiday in Austarilia , if he can invest his money in an S&P 500 equity index that is expected to earn an average return of 10.3 percent over the next three years, how much will he have to save every year start at the ending of this year