Please explain how you got the answer as well, thanks!

Swifty Company's record of transactions concerning part X for the month of April was as follows. Purchases Sales April 1 (balance on hand) 260 $5.70 April 5 460 12 360 27 1,120 28150 560 @ 5.81 460 6.04 360 6.10 7606.38 3606.61 4 18 26 30 (a1) Calculate average-cost per unit. Assume that perpetual inventory records are kept in units only. (Round answer to 2 decimal places, e.g- 2.76.) Average-cost per unit $