29) Pierre sold a parcel of land for $50,000 . He received $10, 000 this year and signs a contract to receive four additional payments of $10. 000 each plus interest . If Pierre had a basis in the land of $ 10,000 and incurred $2. 500 in selling expenses , what is his gross profit percentage ?" A ) 10%6 . 13 ) 25% . 9 10 090. D ) 75%