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 23 22 20 1,100 200 1,400 4.96 1,600 26 900 700 28 1,700 5.11 2,400 31 1,400 1,000 (a1) Calculate average-cost per unit. (Round answer to 2 decimal places, e.g. 2.76.) Average-cost per unit $