Oriole Company's record of transactions concerning part X for the month of April was as follows. Purchases April 1 (balance on hand) 4 $7.00 a 7.10 390 @ 690 590 490 Sales April 5 590 12 490 27 1,380 28 150 7.40 11 18 7.50 26 890 7.80 30 490 a 8.10 (a 1) X Your answer is incorrect. Calculate average-cost per unit. Assume that perpetual inventory records are kept in units only. (Round answer to 4 decimal places, e.g. 2.7682.) Average-cost per unit $ 7.51