I need help calculating perpetual inventory ending inventory if costs are computed at the time of each withdrawal (see Part 3 below)

I need help, with answers on LIFO and AVG-COST as well as a really good explanation (understandable, elementary) to help me do it by myself next time.

DATE # of Units Unit Cost Issued # of units Bal # of Units

2-Jan 1600 3.75 1600

7-Jan 1100 500

10-Jan 1000 4.00 1500

13-Jan 900 600

18-Jan 1400 4.13 700 1300

20-Jan 1100 200

23-Jan 1700 4.25 1900

26-Jan 1200 700

28-Jan 2000 4.38 2700

31-Jan 1700 1000

PART 3

If the perpetual inventory record is kept in dollars, and costs are computed at the time of each withdrawal, would the amounts shown as ending inventory in (1), (2), and (3) above be the same?

What amount would be shown as ending inventory? (Round average cost per unit to 4 decimal places, e.g. 2.7621 and final answers to 0 decimal places, e.g. 6,548.) Would amount be same?

(1) FIFO = 4380 (yes, same)

(2) LIFO = ??? (no, not same)

(3) AVG-COST = ??? (no, not same)