anwsee this multiple choice question

Sheridan Company just began business and made the following four inventory purchases in June: June 1 126 units June 10 168 units June 15 168 units 126 units $870 1310 1410 1110 $4700 June 28 A physical count of merchandise inventory (rounded to whole dollar) on June 30 reveals that there are 180 units on hand. The Inventory method which results in the highest gross profit for June is the LIFO method the FIFO method. not determinable the average cost method