I need help solving (a2) please

Question 1 Presented below is information related to Blowfish radios for the Bramble Company for the month of July Date Transaction Units In Unit Cost Total Units Sold Selling Price Total July 1 Balance 110 $4.40484 3,960 6 Purchase 880 4.50 $6.70 2,211 2,310 330 7 Sale 10 Sale 12 Purchase 15 Sale 18 Purchase 22 Sale 25 Purchase 30 Sale 330 7.00 440 4.80 2,112 220 7.10 1,562 330 4.90 1,617 440 7.10 3,124 550 4.88 2,684 220 7.20 1,584 Totals 2,310 $10,857 1,540 $10,791 (a1) Your answer is correct. Calculate average cost per unit. (Round answer to 2 decimal places, e.g. 2.76.) Weighted-average cost 4.7