Sheldon's Jewelers uses the specific identification method of inventory costing. During May, Sheldon purchased 3 gemstones for $4,000, $5,000, and $6,000 respectively. During May, Sheldon sold two of the gemstones for $6,500 each. At the end of May, Sheldon determined that the $6,000 gemstone was still in this inventory. What is Sheldon's gross profit for the month of May? O $2,000 O $4,000 $500 $3,000