A company just starting business made the following four inventory purchases in June: June 1 150 units $ 390 June 10 200 units 585 June 15 200 units 630 June 28 150 units 510 $2,115 A physical count of merchandise inventory on June 30 reveals that there are 200 units on hand. Using the average-cost method, the amount allocated to the ending inventory on June 30 is: a. $668 b. $536 c. $604 d. $1,551