Complete this question by entering your answers in the tabs below. Calculate the firm's operating income (or loss) if the volume changed from 19,000 units to 11,000 units. Note: Do not round lintermed ste calculations. Complete this question by entering your answers in the tabs below. Calculate the contribution margin per unit and the contribution margin ratio. Note: Do not round intermediate calculations. Round your answers to 2 decimal places. Complete this question by entering your answers in the tabs below. Reler to your answer to port a when total revenues were $209,000. Calculate the firm's operating income (or loss) if unit seling price and variable expense per unit do not change and total revenues decrease by $9,000. Note: Do nat round intermedate calculations. Shown here is an income statement in the traditional format for a firm with a sales volume of 19,000 units: 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 from 19,000 units to 1. 24,000 units. 2. 11,000 units. d. Refer to your answer to part a when fotal revenues were $209,000. 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 $14,000 2. Decrease by $9,000 Complete this question by entering your answers in the tabs below. Refer to your answer to part a when total revenues were $209,000. Calculate the firm's operating income (or lass) if unit seting price and variable expense per unit do not change and total revenues increase by $14,000. Note: Do not round intermediate calculations. Complete this question by entering your answers in the tabs below. Prepare an income statement in the contribution margin format. Complete this question by entering your answers in the tabs below. Calculate the firm's operating income (or loss) if the volume changed from 19,000 units to 24,000 units. Note: Do not round intermediate calctilations