Given the following information, determine the cost of goods sold and of ending inventory at Novomber 30 using the LIFO perpetual inventory method. November 3: 15 units were purchased at $8 per unit. November 11: 18 units were purchased at $9.50 per unit. November 15: 15 units were sold at $45 per unit. November 18: 30 units were purchased at $10.75 per unit. November 30: 20 units were sold at $55 per unit