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as follows: Sold Units The inventory stock card of Beth Corporation on January 2021 Purchase Price Purchase Units Jan 01 P100 10,000 Jan 15 Jan 18 105 15,000 Jan 20 110 500 Jan 30 5,000 Balance 10,000 5,000 20,000 20,500 5,000 15,500 Each unit is sold at P150. Required: Compute for the cost of goods sold, ending inventories and the gross profit using (a) Moving average method, (b) simple average method, and (c) FIFO method