PR 7-5A Periodic inventory by three methods 081.2.4 Dymac Appliances uses the periodic inventory system. Details regarding the inventory of appliances at November 1, 2015, purchases invoices during the next 12 months, and the inventory count at October 31, 2016, are summarized as follows: Purchases Invoices 3rd 4 at $ 76 Inventory Count, October 31 6 Model Inventory, November 1 1st 2nd A10 4 at $ 64 815 8 at $176 4 at 158 E60 G83 3 at 75 3 at 65 4 at $ 70 3 at 170 15 at 6 at 184 8 68 9 at 70 5 7 at 242 6 at 250 5 at 260 10 at 259 9 J34 M90 12 at 240 10 at 246 16 at 267 16 at 270 15 2 at 108 2 at 110 3 at 128 3 at 130 5 Q70 5 at 160 4 at 170 4 at 175 7 at 180 8 Instructions , first-out 1. Determine the cost of the inventory on October 31, 2016, by the first-in, f method. Present data in columnar form, using the following headings: Model Quantity Unit Cost Total Cost 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. 2. Determine the cost of the inventory on October 31, 2016, by the last-in, first-out method, following the procedures indicated in (1). 3. Determine the cost of the inventory on October 31, 2016, by the weighted average cost method, using the columnar headings indicated in (1). Discuss which method (FIFO or LIFO) would be preferred for income tax purposes in periods of (a) rising prices and (b) declining prices.