need Helpp!! 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:

Model	Inventory, January 1	Purchases Invoices 1st	Purchases Invoices 2nd	Purchases Invoices 3rd	Inventory Count, December 31
A10	__	4 at $ 44	4 at $ 47	4 at $ 50	5
B15	8 at $ 87	4 at 78	3 at 84	6 at 91	7
E60	3 at 72	3at 62	15 at 65	9 at 67	5
G83	7 at 232	6 at 240	5 at 250	10 at 249	9
J34	12 at 63	10 at 65	16 at 72	16 at 73	13
M90	2 at 105	2 at 107	3 at 125	3 at 127	5
Q70	5 at 152	4 at 162	4 at 167	7 at 172	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. 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.

3. Determine the cost of the inventory on December 31 by the weighted average cost method.