$108,000 60,400 $ 47,600 Revenues Cost of goods sold ($10,000 + $2.80/unit) Gross profit Operating expenses: Selling ($2,200 + $1.00/unit) Administration ($5,000 + $0.40/unit) Operating income 20,200 12,200 $ 15,200 b. Calculate the contribution margin per unit and the contribution margin ratio. Calculate the contribution margin per unit and the contribution margin ratio. (Round "contribution margin per unit" to 2 decimal places.) Contribution margin per unit Contribution margin ratio