Periodic inventory by three methods Dymac Appliances uses the periodic inventory system. Details regarding the inventory of appliances at January 1, purchases invoices during the next 12 months, and the inventory count at December 31 are summarized follows: Inventory, Model January 1 Purchases Invoices 1st Purchases Invoices 2nd Invoices 3rd Purchases Inventory Count, December 31 A10 4 at $ 39 4 at $ 42 4 at $ 45 B15 8 at $83 4 at 74 3 at 80 6 at 87 E60 3 at 68 3at 58 15 at 61 9 at 63 5 G83 7 at 233 6 at 241 5 at 251 10 at 250 9 12 at 79 10 at 81 16 at 88 16 at 89 13 M90 2 at 104 2 at 106 3 at 124 3 at 126 5 Q70 5 at 153 4 at 163 4 at 168 7 at 173 8 Required: 1. Determine the cost of the inventory on December 31 by the first-in, first-out method. If the inventory of a particular model comprises one entire purchase plus a portion of another purchase acquired at a different unit cost, use a separate line for each purchase. If units are in inventory at two different costs, enter the units PURCHASED MOST RECENTLY first. Dymac Appliances Cost of the Inventory-FIFO Method December 31 Model Quantity A10 A10 B15 B15 E60 G83 134 M90 M90 Q70 070 Total Cost Total 2. Determine the cost of the inventory on December 31 by the last-in, first-out method. If the inventory of a particular model comprises one entire purchase plus a portion of another purchase acquired at a different unit cost, use a separate line for each purchase. If units are in inventory at two different costs, enter the OLDEST units first Dymac Appliances Cost of the Inventory-LIFO Method December 31 Model Quantity A10 A10 B15 E60 G83 G83 134 134 M90 M90 M90 Q70 Q70 Total Unit Cost Total Cost 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 Model Quantity Unit Cost Total Cost A10 B15 E60 G83 134 M90 Q70 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 dedining prices