Shown here is an income statement in the traditional format for a firm with a sales volume of 15,000 units: Prepare an income statement in the contribution margin format. Calculate the contribution margin per unit and the contribution margin ratio. (Do not round your intermediate calculations. Round contribution margin per unit to 2 decimal places.) Calculate the firm\'s operating income (or loss) if the volume changed from 15,000 units to 20,000 units. (Do not round intermediate calculations.) Calculate the firm\'s operating income (or loss) if the volume changed from 15,000 units to 10,000 units. (Do not round intermediate calculations.) Calculate the firm\'s operating income (or loss) if unit selling price and variable expenses do not change and total revenues increase by $15,000. (Do not round intermediate calculations.) Calculate the firm\'s operating income (or loss) if unit selling price and variable expenses do not change and total revenues decrease by $10,000. (Do not round intermediate calculations.) check my workreferencesebook & resources Solution selling price per unit= $105,000/ 15000= $7 cost of goods sold= Fixed cost= $8,000 variable cost = $3.6 per unit selling exp=$13,500 (0.8 variable cost per unit) Admin expenses= $11,500 ($0.5 variable cost per unit) contribution margin per unit= selling price - variable cost per unit = $7 - $4.9= $ 2.1 per unit contribution ratio= (sales- variable cost)/sales=( 7- 4.9)/7= 30% 2. if the sales units are 20,000 the revenue= 20,000 X $7= $140,000 variable cost = ($8000 +( 20,000 X 3.6)= $80,000 gross profit= $60,000 selling cost= ($1500 + 16,000)= $175000 admin cost= $4000 + 10,000= $14,000 operating margin= $28,500 if the volume changed to 10000 units , then the revenue is revenue= $70,000 variable cost = ($8000 +( 10,000 X 3.6)= $44,000 gross profit= $26,000 selling cost= ($1500 + 8,000)= $13000 admin cost= $4000 + 5,000= $9000 operating income= $3000 .