 
 <translate> Adding Harry's $200 to the initial value, the bid is at 300 + 200 = $500. The second bidder doubles the previous value, reaching a value of 500 * 2 = $1000. The third bidder adds three times the value of Harry's, then adds 500 * 3 = $1500. Adding the $1500 to the value of the second bid, the bid is at 1500 + 1000 = $2500. With the final bid of $4000, Harry bids 4000 - 2500 = $1500 more than the third bidder. So the final answer is 1500. <hau> Ƙara $ 200 na Harry zuwa darajar farko, tayin ya kasance a 300 + 200 = $ 500. Mai sayarwa na biyu ya ninka na baya, ya kai darajar 500 * 2 = $ 1000. Mai sayarwa na uku ya ƙara sau uku na darajar Harry, sa'an nan ya ƙara 500 * 3 = $1500. Ƙara da $ 1500 zuwa darajar na biyu tayin, da tayin ne a 1500 + 1000 = $ 2500. Tare da tayin karshe na $ 4000, Harry yayi tayin 4000 - 2500 = $ 1500 fiye da mai sayarwa na uku. Saboda haka amsar karshe ita ce 1500. 