John Adams Company's record of transactions for the month of April was as follows. Purchases Sales April 1 (balance on hand) 600 @ $6.00 April 3 500 @ $10.00 4 1,500 @ 6.08 9 1,400 @ 10.00 8 800 @ 6.40 11 600 @ 11.00 13 1,200 @ 6.50 23 1,200 @ 11.00 22 21 700 @ 6.60 27 900 @ 12.00 29 500 @ 6.79 4,600 5,300 (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