need help on calulating price index and next part

Windsor Corporation began operations on December 1, 2019. The only inventory transaction in 2019 was the purchase of inventory on December 10, 2019, at a cost of $22 per unit. None of this inventory was sold in 2019. Relevant information is as follows. 145 Ending inventory units December 31, 2019 December 31, 2020, by purchase date December 2, 2020 July 20, 2020 145 50 195 During the year 2020, the following purchases and sales were made. at Purchases March 15 345 units July 20 345 units September 4 245 units December 2 145 units at $27 28 31 34 Sales April 10 August 20 November 18 December 12 245 345 195 245 at at The company uses the periodic inventory method Your answer is correct. Calculate average-cost per unit. (Round answer to 2 decimal places, e.e. 2.76.) Average-cost 2832 eTextbook and Media Attempts: 2 of 5 used (a2) Your answer is correct Determine ending inventory under (1) specific identification (2) FIFO, (3) LIFO, and (4) average-cost. (Round answers to o decimal places. e.g. 2,760.) Specific Identification FIFO $ LIFO Average-Cost 30 5 $ 1940 $ e Textbook and Media Your answer is incorrect Calculate price index. (Round answer to 4 decimal places, e.g. 2.7653.) Price Index