Wan Tan Corp. made the following four inventory purchases in June: June 1 150 units $5.20 June 10 200 units $5.85 June 15 200 units $6.30 June 28 150 units $6.60 On June 22, 450 units were sold. The company uses the perpetual inventory system and the weighted average to value the inventory. Calculate the cost of goods sold for the sale. Round to the nearest whole dollar. Select one: a. $2,580 b. $2,628 c. $2,700 d. $1,572