Opening balance (1 April)- Inventory 3,400 Freight-in costs 220 Closing balance (30 April) Inventory 2,320 Freight-out costs. 4,500 Purchases of inventory: 8 April 17 April 25 April 3,450 880 2,500 Marketing costs 3,550 I Required: (a) Based on the above financial information for Big Box Pty Limited calculate for the month of April: i) Net purchases ii) Cost of goods purchased iii) Cost of sales; and iv) Gross Margin percentage (4 marks).