ctice Shown here is an income statement in the traditional format for a firm with a sales volume of 19,000 units: Revenues cost of goods sold ($12,000 - $2.80/unit) Gross profit Operating expenses: Selling ($2,200 $1.10/unit) Administration (54,650 + $0.40/unit) Operating income $152,900 65,200 $ 86,800 23, 100 12,250 $ 51,450 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. 24,000 units 2. 11.000 units d. Refer to your answer to part a when total revenues were $152,000. Calculate the firm's operating income for loss) if unit selling price and variable expense per unit do not change and total revenues 1. Increase by $13,500. 2. Decrease by $9,000 Complete this question by entering your answers in the tabs below. Required A Required Required 1 Required C2 Required 01 Required 2 Refer to your answer to part a when total revenues were $152,000. Calculate the firm's operating income (or loss) if unit selling price and variable expense per unit do not change and total revenues, calculate the firm's operating income (or losa) unit selling price and variable expense per unit do not change and total revenues increase by $13,500. (Do not round intermediate calculations) Show less Operating income