An investor takes a long position in one December gold futures contracts on June 20. One contract is 100 oz. and the futures price is $1,460 per ounce. The initial margin requirement for one contract is $6.000 and the maintenance margin is $4,000 per contract. The investor closes out the long position on August 20, and the futures price is $1,500 per ounce. How much is her total gain? $2,000 O $4,540 $6,000 O $4,000