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 250 units on hand. The inventory method which results in the highest gross profit for June is Select one: a.the weighted average unit cost method. b.the FIFO method. c.the LIFO method. d.not determinable.