Cullimber Company uses a periodic inventory system reports the following for the month of June. Unit Cost $5 Date June 1 12 23 30 Explanation Inventory Purchases Purchases Inventory Units 120 380 210 260 Total Cost $600 2,280 1.470 6 7 A sale of 400 units occurred on June 15 for a selling price of $7 and a sale of 50 units on June 27 for $9. (a) Calculate the average cost per unit, using a perpetuat inventory system. (Round intermediate calculations to decimal places, og 5.250 and final answers to 3 decimal places, e.g. 5.125.) June 15 June 12 5 June 15 $ June 23 June 27 5