Hi can you please help me solve this Im not sure how to do it, thank you very much!

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 as follows: Purchases Invoices Inventory, Invcniory Count, Model January 1 15! 2nd 3rd December 31 A10 _ 4at$64 4at$70 4at$76 6 515 8 at $ 175 4 at 158 3 at 170 6 at 184 8 E60 3 at 75 3 at 65 15 at 68 9 at 70 5 583 7 at 242 6 at 250 5 at 260 10 at 259 9 J34 12 at 240 10 at 246 15 at 267 16 at 270 15 M90 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 Required: 1. Determine the cost of the inventory on December 31 by the firstAin, rst-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 MOSr RECENTLY rst. 2. Determlne the cost of the Inventory on December 31 by the last-In, rst-out method. If the inventory of a particular model comprises one entire purchase plus a portion of another purchase acquired at a different unit oost, use a separate line for each purchase. If units are in inventory at two different c0515, enter the OLDEST units rst. 3 Determine the cost of th ventory on December 31 by the weighted average cost method. ' would he preferred for income tax purposes in periods of rising prices