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4. Assume the following transactions have occurred regarding a specific SKU in 2022 : - Ending inventory in 2021 of 100 units valued at $1,175. - January 15, purchased 1000 units at $12.00 per unit - January 31, sold 450 units at $15.50 per unit - February 19, sold 120 units at $15.50 per unit - March 3, purchased 500 units at $13.00 per unit - March 25, sold 500 units at $16.00 per unit - April 16, sold 250 units at $16.50 per unit - May 20 , sold 80 units at $17.00 per unit - June 6, purchased 1000 units at $13.50 per unit - July 13 , sold 800 units at $16.00 per unit - August 25, purchased 1200 units at $14.0 ber unit - October 17 , sold 950 units at $17.00 per unit Determine the ending inventory and cost of goods sold using the three methods of inventory valuation: FIFO, LIFO, and weighted average method