Show work as to how the missing data is calculated.

Cost-Volume-Profit Relations: Missing Data Following are data from four separate companies. Case A Case B Case C Case D Unit sales ................................. 2,500 1.600 ? '? Sales revenue .............................. $80,000 ? ? $240,000 Variable cost per unit ........................ $20 $2 $24 ? Contribution margin ......................... ? $1.600 ? ? Fixed costs ................................ $14,000 7 $164,000 ? Net income ................................ ? $900 ? '? Unit contribution margin ...................... ? ? ? $30 Break-even point (units) ...................... '? 7 8.000 4,000 Margin of safety (units) ....................... ? '? 600 2,000 Required Supply the missing data in each independent case