Problem 12-19 Prepare a contribution margin format income statement answer what-if questions LO 7, 8,9 Shown here is an income statement in the traditional format for a firm with a sales volume of 7,600 units. Cost formulas also are shown: $34,700 21,000 $13,700 Revenues Cost of goods sold ($5,800+ $2.00/unit) Gross profit Operating expenses: 1,854 5,320 $6,526 Selling ($1,170$0.09/unit) Administration ($3,800$0.20/unit) Operating income c-1. Calculate the firm's operating income (or loss) if the volume changed from 7,600 units to 11,400 units. (Do not round intermediate calculations.) c-2 Calculate the firm's operating ncome or loss if the volume changed from 7,600 units to o not round intermediate ca cu ations 800 uns Refer to your answer to part a for total revenues of $34,700 d-1. Calculate the firm's operating income (or loss) if unit selling price and variable expenses per unit do not change and total revenues increase by $10,000. (Round intermediate calculations to 2 decimal places.) d-2. Calculate the firm's operating income (or loss) if unit selling price and variable expenses per unit do not change and total revenues decrease by S3,500. (Round intermediate calculations to 2 decimal places.)