$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 d. Refer to your answer to part a when total revenues were $108,000. Calculate the firm's operating income (or loss) if unit selling price and variable expense per unit do not change and total revenues 1. Increase by $15,000. 2. Decrease by $10,000. Refer to your answer to part a when total revenues were $108,000. Calculate the firm's operating income (or loss) if unit selling price and variable expense per unit do not change and total revenues increase by $15,000. 108,000 Contribution Margin Income Statement Revenues $ Variable expenses: Cost of goods sold $ 50,400 Selling expenses 18,000 Administrative expenses 7,200 75,600 32,400 $ Total variable expenses Contribution margin Fixed expenses: Cost of goods sold Selling expenses [Administrative expenses | $ 10,000 2,200 5,000 Total fixed expenses 17,200 15,200 Operating income $ Refer to your answer to part a when total revenues were $108,000. Calculate the firm's operating income (or loss) if unit selling price and variable expense per unit do not change and total revenues decrease by $10,000