A federal government contractor is considering buying a software package at a cost of $500,000. The software company will charge an annual maintenance fee of $30,000 payable at the beginning each year including the very first year. The contracting company is bidding on a four-year government contract. The equivalent uniform annual cost of the software that should be included in the bid at an interest rate of 15% $527,650, $517,346, $598,497, or $615,649?