Supply the missing data in each independent case. Case A Case B Case C Case D Case E Unit sales 350 150 ? ? ? Sales revenue $17,500 ? ? $45,000 $25,000 $20 $2 $7 ? ? Variable cost per unit Contribution Margin ? $600 ? ? $10,000 Fixed costs $3,750 ? $30,000 ? ? ? -$200 ? ? ? ? ? ? $2 2 $2 Operating income Unit contribution margin Break-even point (units) ? ? 2,500 7,500 ? Margin of Safety ? ? 1,000 7,500 1,400