Pigwig Company uses a periodic inventory system for its merchandise. The following information pertains to its July, 2021 Number of Units 27 Transaction/Condition Beginning Inventory First Purchase Second Purchase 25 Cost Per Unit $35.00 $36.00 $37.00 $39.00 23 Third Purchase 24 At the end of July there were 34 units remaining in Pigwig's inventory. Calculate the ending inventory as well as the cost of goods sold under the following methods: a) FIFO b) LIFO c) Weighted Average