I need this question answered ASAP please!

Oppong Corporation made purchases of a particular product in the current year as follows: Ending inventory consists of 470 units, specifically identified as follows : - 180 units from beginning inventory - 260 units from the January 2 purchase - 30 units from the June 8 purchase Assuming a periodic system, determine the costs to be assigned to cost of goods sold and ending inventory using the following systems : a. FIFO b. LIFO c. Weighted Average d. Specific Identification