Hello, I really need help with this exercise.

Compute cost of goods sold, assuming Swifty uses: (Round average cost per unit to 4 decimal places, e.g. 2.7631 and final answers to 0 decimal places, e.g. 6,548.)

				Cost of goods sold
(a)		Periodic system, FIFO cost flow		NT$enter a new taiwan dollar amount
(b)		Perpetual system, FIFO cost flow		NT$enter a new taiwan dollar amount
(c)		Periodic system, LIFO cost flow		NT$enter a new taiwan dollar amount
(d)		Perpetual system, LIFO cost flow		NT$enter a new taiwan dollar amount
(e)		Periodic system, weighted-average cost flow		NT$enter a new taiwan dollar amount
(f)		Perpetual system, moving-average cost flow		NT$enter a new taiwan dollar amount

really need explanations, i don't really understand how to do this kind of exercises (will rate)

Thanks

Swifty Ltd. is a multiproduct firm. Presented below is information concerning one of its products, the Jayhawk. Date Transaction Quantity Price/Cost 1/1 Beginning inventory 840 NT$12 2/4 Purchase 1,680 18 2/20 Sale 2,100 30 4/2 Purchase 2,520 23 11/4 Sale 1,840 33