Vaughn's Used Cars uses the specific identification method of costing inventory. During March, Vaughn purchased three cars for $13300, $15000, and $19200, respectively. During March, two cars are sold for a total of $35300. Vaughn determines that at March 31, the $15000 car is still on hand. What is Vaughn's gross profit for March? $1100. O $1800. O $2800. O $7000