Periodic inventory by three methods

Pappa's Appliances uses the periodic inventory system. Details regarding the inventory of appliances at January $1,$ purchases invoices during the year, and the inventory count

at December $31$ are summarized as follows:

Required:

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. PLEASE HELP DETERMINE FIFO, LIFO, AND WEIGHTED AVARAGE