Tamarisk Company's record of transactions for the month of April was as follows. Purchases Sales April 1 (balance on hand) 1,200 $6.00 April 3 1,000 @ $10.00 4 3,000 6.08 9 2,800 @ 10.00 8 1,600 @ 6.40 11 1,200 @ 11.00 13 2,400 6.50 23 2,400 @ 11.00 21 1,400 6.60 27 1,800 12.00 29 1,000 @ 6.79 9,200 10,600 (a1) Assuming that periodic inventory records are kept in units only, calculate the average cost per unit. (Round answer to 2 decimal places, e.g. 2.76.) Average-cost per unit $ per unit