I need to understand this how to solve it

Problem 6-2A Alternative cost flows-perpetual LO2 Xcel CHECK FIGURES: 1. Ending inventory; a. $35,750; b. $35,107.80; 2. Ending inventory = $35,395.00 The Stilton Company has the following inventory and credit purchases during the fiscal year ended December 31, 2020. 447CHAPTER 6 Inventory Costing and Valuation Beginning .......com 640 units $75/unit Feb. 10...... 350 units Aug. 21. 230 units $72/unit $85/unit Stilton Company has two credit sales during the period. The units have a selling price of $135,00 per unit Sales Mar. 15 ...... 430 units Sept. 10... 335 units Stilton Company uses a perpetual inventory system. Required 1. Calculate the dollar value of cost of goods sold and ending inventory using: a. FIFO b. Moving weighted average. Round to two decimal places. 2. Calculate the dollar value of cost of goods sold and ending inventory using specific identification, assum ing the sales were specifically identified as follows: Mar. 15: 230 units from beginning inventory 200 units from the February 10 purchase Sept. 10: 225 units from beginning inventory 40 units from the February 10 purchase 70 units from the August 21 purchase pu 3. Using information from your answers in Parts 1 and 2, journalize the credit purchase on February 10 unit the credit sale on September 10 for each of: a. FIFO b. Moving weighted average c. Specific identification