Units Pina Colada Corp. uses a periodic inventory system reports the following for the month of June. Date Explanation Unit Cost Total Cost June 1 Inventory 120 55 5600 12 Purchases 380 2,280 23 Purchases 210 7 1,470 30 Inventory 250 A sale of 400 units occurred on June 15 for a selling price of $8 and a sale of 60 units on June 27 for $9. (a) Calculate the average cost per unit, using a perpetual inventory system. (Round intermediate calculations to 0 decimal places, e.g. 5.250 and final answers to 3 decimal places, e.g. 5.125.) June 1 s June 12 $ June 15 5 June 23 June 27 5