4. Beginning inventory and purchases and sales data for Commodity "X" for the month of July are as follows: Inventory July 1 35 units Br 50 Sales July 7 15 units Br 55 18 10 units Go Br 58 27 12 units Br 62 Purchases July 3 20 units 51 20 15 units 52 1) Compute the cost of ending inventory and cost of goods sold using FIFO and AVC under a) Periodic inventory system b) Perpetual inventory system 2) Pass the necessary journal entry to record purchase, vale and end of year adjusting entry