A)Calculate the weighted average cost per unit andthen calculate(i) ending inventory, (ii) cost of goods sold, (iii) gross profit, and (iv) gross profit rate under each of the following methods.(1)LIFO (2) FIFO (3) Average cost B)Compare results for the three cost flow assumptions. C)After doing it with the periodic system do it again using the perpetual system.

You are provided with the following information for Najera Inc. for the month ended June 30, 2017. Najera uses the periodic method for inventory.

Date	quantity	unit cost or selling price
June	1	Beginning inventory	38	$42
June	4	Purchase	137	46
June	10	Sale	115	69
June	11	Sale return	18	69
June	18	Purchase	54	48
June	18	Purchase return	8	48
June	25	Sale	64	74
June	28	Purchase	30	52