The inventory records of Urban Inc. show the following data for its merchandise inventory.

Question: Compute the cost of goods sold and ending inventory for the month ending June 30 using the average cost method (periodic inventory system) and the moving average method (perpetual inventory system). (Round your final answers to the nearest dollar. Round all unit costs in your calculations to two decimal places.)

Please show the working process, thanks!

Units Unit Cost 48 $38.00 72 40.00 Date Jan 1 Inventory Jan 3 Purchase Jan 7 Sale Jan 10 Purchase Jan 20 Sale Jan 30 Purchase 80 80 41.60 80 80 43.20 COGS Ending Inventory $ 0 $ 0 a. Average cost (periodic inventory system) b. Moving average (perpetual inventory system) 0 0