29) Crystal Company's variable costing income statement for the month of May appears below:

Crystal Company Income Statement For the month ended May 31

Sales ($10 per unit)		$900,000
Less: Variable costs
Variable cost of goods sold:
Beginning inventory	$125,000
Add: Variable cost of goods manufactured	400,000
Goods available for sale	$525,000
Less: Ending inventory	75,000
Variable cost of goods sold	$450,000
Variable selling expense	90,000
Total variable costs		$540,000
Contribution margin		360,000
Fixed costs:
Fixed manufacturing overhead	$240,000
Fixed selling and administrative	90,000
Total fixed costs		$330,000
Operating income		$30,000

The company produces 80,000 units each month. Variable production costs per unit and total fixed costs have remained constant over the past several months.