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 Model Inventory, January 1 1st 2nd 3rd Inventory Count December 31 A10 4 at $ 41 4 at $ 44 4 at $ 47 5 315 8 at $88 4 at 79 3 at 85 6 at 92 3 at 69 3 at 59 15 at 62 9 at 64 5 E60 G83 7 at 235 6 at 243 5 at 253 10 at 252 9 134 12 at 54 10 at 56 16 at 63 16 at 64 13 M90 2 at 104 2 at 106 3 at 124 3 at 126 5 070 5 at 169 4 at 179 4 at 184 7 at 189 8 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 5 46.4 X $ 232 X B15 7 91 X 637 X E60 5 64 X 320 X G83 252 X 2,268 X 334 13 64 X 832 X M90 5 125.2 X 626 X 270 8 188.375 X 1,507 X Total $ 6,422 X