You work for a development firm and have a residential building lot for sale. You have received two purchase offers. Offer A is offering a $200,000 down payment plus $450,000 payable in one year. Offer B is $150,000 down plus two $250,000 payments due six and twelve months from now. Which offer has the greater economic value if money can earn 4% compounded quarterly and how much greater is the higher offer in today's dollars?