Cullumber Enterprises uses a periodic inventory system for buckets it sells. It had a beginning inventory on April 1 of 84 units at a cost of $6 per unit. During April, the following purchases and sales were made. Purchases April 7 74 units at $7.00 13 148 units at $8.00 23 118 units at $9.00 29 55 units at $10.00 395 Sales April 5 148 units at $20 11 20 =28 118 units at $20 108 units at $20 30 54 units at $20 428