3. Prepare a variable-casting income statement for Pattison Products, Inc., for the month of October. Pattison Products, Inc. Variable Costing Income Statement For the Month of October Less: Contribution margin Less: Operating income 4. What if November production was 48,000 units, costs were stable and sales were 49,000 units? What is the cost of ending inventory? If an amount is zero, enter "o". What is operating income for November