Following Information is taken form the Books of Ahmeds Store who uses perpetual inventory system.

Date	Purchased in units	Rate $
01-01-20	800	9.00
02-01-20	500	9.50
04-01-20	1500	10.20
08-01-20	800	9.60
13-01-20	1200	9.75
15-01-20	800	9.90
19-01-20	500	10.19
24-01-20	700	9.81
25-01-20	1000	9.24
28-01-20	1500	9.75
Date	Sales in Units	Rate $
03-01-20	1000	15.00
07-01-20	1300	15.00
11-01-20	900	16.50
14-01-20	1200	16.50
17-01-20	900	18.00
21-01-20	500	18.00
26-01-20	500	18.75
30-01-20	2000	17.25

Requirements:

With the Assumption of perpetual inventory system to record above transactions with the use of following methods.

1. FIFO
2. LIFO
3. Average Cost