Co Cost of the Inventory-LIFO Method December 31 Model Quantity Unit Cost Total Cost A10 A10 E60 E60 GB3 334 334 M90 M90 M90 970 970 Total 3. Determine the cost of the inventory on December 31 by the weighted average cost method. Dymac Appliances Cost of the Inventory-Weighted Average Method December 31 Quantity Unit Cost Total Cost Model A10 $ B15 LEGO M90 970 Total 4a. Which inventory method would be preferred for income tax purposes in periods of rising prices? 4b. Which inventory method would be preferred for income tax purposes in periods of declining prices? Co Cost of the Inventory-LIFO Method December 31 Model Quantity Unit Cost Total Cost A10 A10 E60 E60 GB3 334 334 M90 M90 M90 970 970 Total 3. Determine the cost of the inventory on December 31 by the weighted average cost method. Dymac Appliances Cost of the Inventory-Weighted Average Method December 31 Quantity Unit Cost Total Cost Model A10 $ B15 LEGO M90 970 Total 4a. Which inventory method would be preferred for income tax purposes in periods of rising prices? 4b. Which inventory method would be preferred for income tax purposes in periods of declining prices