Required information [The following information applies to the questions displayed below] Mason Corporation began operations at the beginning of the current year. One of the company's products, a refrigeration element, sells for $185 per unit. Information related to the current year's activities follows. Variable costs per unit: Direct material Direct labor Manufacturing overhead Annual fixed costs: Manufacturing overhead Selling and administrative Production and sales activity: Production (units) Sales (units) 20 37 48 $600,000 860,000 24,000 20,000 Mason carries its finished-goods inventory at the average unit cost of production and is subject to a 30 percent income tax rate. There was no work in process at year-end