Waterway Company's record of transactions for the month of April was as follows. Purchases Sales April 1 (balance on hand) 1,380 @ $6.00 April 3 1,150 @ $10.00 4 3,450 @ 6.08 9 3,220 @ 10.00 8 1,840 @ 6.40 11 1,380 @ 11.00 13 2.760 @ 6.50 23 2.760 @ 11.00 21 1,610 @ 6.60 27 2,070 @ 12.00 29 1.150 @ 6.79 10.580 12.190 (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