Sara owns 160 acres of farmland worth $800,000. She inherited the land from her father 30 years ago when it was worth $200,000. Her married son would like to buy the land, but has limited funds. He proposes buying the land on a contract for deed, paying $50,000 down and the balance over 20 years at 4% interest. Assume that if Sara sold the land for cash, her tax rate on the gain would be 23.8%, but if she sold it on a contract her rate would be 15% on the gain and 28% on the interest income on each payment. Advise Sara on how much tax she would have to pay under each option (selling for cash or on the contract, also assume Sara could earn 4% interest if she sold for cash and invested the money)