shown here is an income statement in the traditional format for a firm with sales volume of 10000 units. cost formulas also are shown:

revenues $50000 cost of goods sold ($9000+$2.60/unit) gross profit $15000 operating expenses: selling ($2300+$0.15/unit) $3800 administrative ($4700+0.25/unit) $7200 operating income $4000

prepare an income statement in the contribution margin format. calculate the contribution margin per unit and the contribution margin ratio. calculate the firm's operating income (or loss) if the volume changed from 10000 units to 14000 units and 6000 units. refer to your answer to part a for total revenues of $50000. calculate the firm's operating income (or loss) if unit selling price and variable expenses per unit do not change and total revenues increase $15000 and decrease $13000