Please help me fill in the blanks where the word Answer is. Thank you so much.

Cost-Volume-Profit Relations: Missing Data

Following are data from 4 separate companies. Supply the missing data in each independent case.

	Case A	Case B	Case C	Case D
Unit Sales	1,000	800	Answer	Answer
Sales revenue	$20,000	Answer	$Answer	$60000
Variable cost per unit	$10	$1	$12	$Answer
Contribution margin	$Answer	$800	$Answer	$Answer
Fixed Costs	$7,000	$Answer	$80,000	$Answer
Net income	$Answer	$500	$Answer	$Answer
Unit contribution margin	$Answer	$Answer	$Answer	$15
Break-even point (units)	Answer	Answer	4,000	2,000
Margin of safety (units)	Answer	Answer	300	1,000