Carla Company determined its ending inventory at cost and at LCNRV at December 31, 2020, December 31, 2021, and December 31, 2022, as shown below. 12/31/20 12/31/21 12/31/22 Cost $615,500 703,000 939,700 NRV $615,500 634,000 863.100 (a) Prepare the journal entries required at December 31, 2021, and at December 31, 2022, assuming that a perpetual inventory system and the cost-of-goods-sold method of adjusting to LCNRV is used. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No entry" for the account titles and enter Ofor the amounts.) Date Account Titles and Explanation Debit Credit 12/31/21 12/31/22 (b). Prepare the journal entries required at December 31, 2021, and at December 31, 2022, assuming that a perpetual inventory is recorded at cost and reduced to LCNRV using the loss method. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No entry" for the account titles and enter O for the amounts.) Date Account Titles and Explanation Debit Credit 12/31/21 12/31/22