Some of the information found on a detail inventory card for Tamarisk Inc. for the first month of operations is as follows.

		Received
Date		No. of Units		Unit Cost		Issued, No. of Units		Balance, No. of Units
January 2		1,300		$4.38				1,300
7						800		500
10		700		4.67				1,200
13						600		600
18		1,100		4.82		400		1,300
20						1,100		200
23		1,400		4.96				1,600
26						900		700
28		1,700		5.11				2,400
31						1,400		1,000

1a) Calculate average-cost per unit.

1b) From these data compute the ending inventory on each of the following bases. Assume that perpetual inventory records are kept in units only. (1) First-in, first-out (FIFO). (2) Last-in, first-out (LIFO). (3) Average-cost.

1c) 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?