5. supply the missing data in each independent case. 12.5 points case a case b case c case d case e unit sales 350 150 ? ? ? sales revenue $17,500 ? ? $45,000 $25,000 variable cost per unit $20 $2 $7 ? ? contribution margin ? $600 ? ? $10,000 fixed costs $3,750 ? $30,000 ? ? operating income ? -$200 ? ? ? unit contribution margin ? ? ? $2 $2 break-even point (units) ? ? 2,500 7,500 ? margin of safety ? ? 1,000 7,500 1,40