Donnelly Excavating has received two offers on a used backhoe that Donnelly Is advertising for sale. Offer 1 is for $10,000 down and $30,000 in 18 months. Offer 2 is for $8000 down and $33,000 in two years from now. What is the economic value today of each offer if money is worth 4.25% compounded semiannually? Which offer should be accepted?