Shown here is an income statement in the traditional format for a firm with a sales volume of 16,500 units: $148,500 57, 700 $ 90, 800 Revenues Cost of goods sold ($11, 500 + $2. 80/unit) Gross profit Operating expenses: Selling ($2,300 + $1. 10/unit) Administration ($4, 650 + $0.50/unit) Operating income 20, 450 12, 900 $ 57, 450 Required: a. Prepare an income statement in the contribution margin format. b. Calculate the contribution margin per unit and the contribution margin ratio. c. Calculate the firm's operating income (or loss) if the volume changed to 1. 21,500 units. 2. 8,500 units. d. Refer to your answer to part a when total revenues were $148,500. 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 $14,500. 2. Decrease by $9,000. Complete this question by entering your answers in the tabs below. Required A Required B Required C1 Required C2 Required D1 Required D2 Prepare an income statement in the contribution margin format. Contribution Margin Income Statement Revenues $ 148,500 Variable expenses Cost of goods sold Selling expenses Administrative expenses Total variable expenses Contribution margin 0 148,500 Fixed expenses Cost of goods sold Selling expenses Administrative expenses 0 Total fixed expenses Operating income $ 148,500