Kevin sold property with an adjusted basis of $58,000. The buyer assumed Kevin's existing mortgage of $40,000 and agreed to pay an additional $60,000 consisting of a cash down payment of $40,000, and payments of $4,000, plus interest, per year for the next 5 years. Kevin paid selling expenses totaling $2,000. What is Kevin's gross profit percentage? A) 33 1/3% B) 40% C) 60% D) 66 2/3%