Columbia Corporation produces a single product. The company's variable costing income statement for November appears below: Columbia Corporation Income Statement For the Month ended November 30 Sales ($20 per unit) $846,000 Variable expenses: Variable cost of goods sold 549,900 Variable selling expense 126,900 Total variable expenses 676,800 Contribution margin 169,200 Fixed expenses: Manufacturing 107,880 Selling and administrative 35,960 Total fixed expenses 143,840 Net operating income $ 25,360 During November, 35,960 units were manufactured and 8,080 units were in beginning inventory. Variable production costs per unit, total fixed manufacturing expenses, and the number of units produced were the same in prior months. 1. Assume Columbia Corporation uses absorption costing. a) Compute the unit cost b) Prepare an income statement for the month of November. 2. Reconcile the variable costing and absorption costing operating incomes