Sheldon's Jewelers uses the specific identification method of inventory costing. During May, Sheldon purchased 3 gemstones for $4,000, $7,000, and $9.000 respectively. During May, Sheldon sold two of the gemstones for 12,500 each. At the end of May. Sheldon determined that the $7,000 gemstone was still in his inventory. What is Sheldon's gross proht for the month of May