8. The company should not delete department B because it is generating a positive operating income. The company should look for ways to reduce its cost of sales and operating expenses in order to increase its operating income.
9. The cost of goods sold and ending inventory under the perpetual inventory system and assume that the company uses FIFO methods of inventory system are as follows:
Cost of goods sold = 5 * 10 + 8 * 12.50 + 15 * 14 = 145
Ending inventory = 12 - 5 = 7
10. The cost of goods sold and ending inventory under a periodic inventory system and assume that the company uses LIFO methods of inventory system are as follows:
Cost of goods sold = 5 * 10 + 8 * 12.50 = 110
Ending inventory = 15 * 14 = 210
11. The cost of goods sold and ending inventory under Average cost Method (Moving Average) are as follows:
Cost of goods sold = (12 * 10 + 10 * 12.50 + 8 * 12.50 + 15 * 14) / 4 = 126.25
Ending inventory = (12 * 10 + 10 * 12.50 + 8 * 12.50 + 15 * 14) / 4 - 8 = 118.75